20310661621434 has 16 divisors (see below), whose sum is σ = 40771217427840. Its totient is φ = 6745238176320.

The previous prime is 20310661621433. The next prime is 20310661621489. The reversal of 20310661621434 is 43412616601302.

It is a junction number, because it is equal to n+sod(n) for n = 20310661621392 and 20310661621401.

It is not an unprimeable number, because it can be changed into a prime (20310661621433) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6245589279 + ... + 6245592530.

It is an arithmetic number, because the mean of its divisors is an integer number (2548201089240).

Almost surely, 2^{20310661621434} is an apocalyptic number.

20310661621434 is an abundant number, since it is smaller than the sum of its proper divisors (20460555806406).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20310661621434 is a wasteful number, since it uses less digits than its factorization.

20310661621434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12491182085.

The product of its (nonzero) digits is 124416, while the sum is 39.

The spelling of 20310661621434 in words is "twenty trillion, three hundred ten billion, six hundred sixty-one million, six hundred twenty-one thousand, four hundred thirty-four".