20514203621 has 4 divisors (see below), whose sum is σ = 20514500544. Its totient is φ = 20513906700.

The previous prime is 20514203609. The next prime is 20514203623. The reversal of 20514203621 is 12630241502.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20514203621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20514203623) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15626 + ... + 203156.

It is an arithmetic number, because the mean of its divisors is an integer number (5128625136).

Almost surely, 2^20514203621 is an apocalyptic number.

It is an amenable number.

20514203621 is a deficient number, since it is larger than the sum of its proper divisors (296923).

20514203621 is a wasteful number, since it uses less digits than its factorization.

20514203621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 296922.

The product of its (nonzero) digits is 2880, while the sum is 26.

The spelling of 20514203621 in words is "twenty billion, five hundred fourteen million, two hundred three thousand, six hundred twenty-one".