20763232251 has 16 divisors (see below), whose sum is σ = 29331154944. Its totient is φ = 13019752064.

The previous prime is 20763232249. The next prime is 20763232309. The reversal of 20763232251 is 15223236702.

It is a cyclic number.

It is not a de Polignac number, because 20763232251 - 2¹ = 20763232249 is a prime.

It is a super-2 number, since 2×20763232251² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20763232211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44715 + ... + 208628.

It is an arithmetic number, because the mean of its divisors is an integer number (1833197184).

Almost surely, 2^20763232251 is an apocalyptic number.

20763232251 is a deficient number, since it is larger than the sum of its proper divisors (8567922693).

20763232251 is a wasteful number, since it uses less digits than its factorization.

20763232251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254970.

The product of its (nonzero) digits is 30240, while the sum is 33.

Adding to 20763232251 its reverse (15223236702), we get a palindrome (35986468953).

The spelling of 20763232251 in words is "twenty billion, seven hundred sixty-three million, two hundred thirty-two thousand, two hundred fifty-one".