20464051031 has 4 divisors (see below), whose sum is σ = 20464356552. Its totient is φ = 20463745512.

The previous prime is 20464050979. The next prime is 20464051037. The reversal of 20464051031 is 13015046402.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20464051031 - 2¹⁸ = 20463788887 is a prime.

It is a super-2 number, since 2×20464051031² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20464051037) 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, 4001 + ... + 202346.

It is an arithmetic number, because the mean of its divisors is an integer number (5116089138).

Almost surely, 2^20464051031 is an apocalyptic number.

20464051031 is a deficient number, since it is larger than the sum of its proper divisors (305521).

20464051031 is an equidigital number, since it uses as much as digits as its factorization.

20464051031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305520.

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

Adding to 20464051031 its reverse (13015046402), we get a palindrome (33479097433).

The spelling of 20464051031 in words is "twenty billion, four hundred sixty-four million, fifty-one thousand, thirty-one".