20346461402631 has 128 divisors (see below), whose sum is σ = 36542338301952. Its totient is φ = 9761990400000.

The previous prime is 20346461402551. The next prime is 20346461402669. The reversal of 20346461402631 is 13620416464302.

It is not a de Polignac number, because 20346461402631 - 2¹⁵ = 20346461369863 is a prime.

It is a super-2 number, since 2×20346461402631² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20346461402731) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 107952966 + ... + 108141276.

It is an arithmetic number, because the mean of its divisors is an integer number (285487017984).

Almost surely, 2^{20346461402631} is an apocalyptic number.

20346461402631 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

20346461402631 is a deficient number, since it is larger than the sum of its proper divisors (16195876899321).

20346461402631 is a wasteful number, since it uses less digits than its factorization.

20346461402631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189133.

The product of its (nonzero) digits is 497664, while the sum is 42.

Adding to 20346461402631 its reverse (13620416464302), we get a palindrome (33966877866933).

The spelling of 20346461402631 in words is "twenty trillion, three hundred forty-six billion, four hundred sixty-one million, four hundred two thousand, six hundred thirty-one".