20929698241 has 3 divisors (see below), whose sum is σ = 20929842913. Its totient is φ = 20929553570.

The previous prime is 20929698157. The next prime is 20929698253. The reversal of 20929698241 is 14289692902.

The square root of 20929698241 is 144671.

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 is not a de Polignac number, because 20929698241 - 2¹³ = 20929690049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20929698281) 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, 72336 + ... + 217006.

Almost surely, 2^20929698241 is an apocalyptic number.

20929698241 is the 144671-st square number.

20929698241 is the 72336-th centered octagonal number.

It is an amenable number.

20929698241 is a deficient number, since it is larger than the sum of its proper divisors (144672).

20929698241 is an frugal number, since it uses more digits than its factorization.

20929698241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289342 (or 144671 counting only the distinct ones).

The product of its (nonzero) digits is 1119744, while the sum is 52.

The spelling of 20929698241 in words is "twenty billion, nine hundred twenty-nine million, six hundred ninety-eight thousand, two hundred forty-one".