20762211694249 has 3 divisors (see below), whose sum is σ = 20762216250807. Its totient is φ = 20762207137692.

The previous prime is 20762211694241. The next prime is 20762211694283. The reversal of 20762211694249 is 94249611226702.

The square root of 20762211694249 is 4556557.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 20714832336025 + 47379358224 = 4551355^2 + 217668^2 .

It is not a de Polignac number, because 20762211694249 - 2³ = 20762211694241 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20762211694249.

It is not an unprimeable number, because it can be changed into a prime (20762211694241) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 2278279 + ... + 6834835.

It is an arithmetic number, because the mean of its divisors is an integer number (6920738750269).

Almost surely, 2^{20762211694249} is an apocalyptic number.

20762211694249 is the 4556557-th square number.

20762211694249 is the 2278279-th centered octagonal number.

It is an amenable number.

20762211694249 is a deficient number, since it is larger than the sum of its proper divisors (4556558).

20762211694249 is an frugal number, since it uses more digits than its factorization.

20762211694249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9113114 (or 4556557 counting only the distinct ones).

The product of its (nonzero) digits is 5225472, while the sum is 55.

The spelling of 20762211694249 in words is "twenty trillion, seven hundred sixty-two billion, two hundred eleven million, six hundred ninety-four thousand, two hundred forty-nine".