20450402134564 has 12 divisors (see below), whose sum is σ = 35789958288000. Its totient is φ = 10224699766568.

The previous prime is 20450402134543. The next prime is 20450402134601. The reversal of 20450402134564 is 46543120405402.

It is a super-3 number, since 3×20450402134564³ (a number of 41 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 125233384 + ... + 125396575.

It is an arithmetic number, because the mean of its divisors is an integer number (2982496524000).

Almost surely, 2^{20450402134564} is an apocalyptic number.

It is an amenable number.

20450402134564 is a deficient number, since it is larger than the sum of its proper divisors (15339556153436).

20450402134564 is a wasteful number, since it uses less digits than its factorization.

20450402134564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250650362 (or 250650360 counting only the distinct ones).

The product of its (nonzero) digits is 460800, while the sum is 40.

Adding to 20450402134564 its reverse (46543120405402), we get a palindrome (66993522539966).

The spelling of 20450402134564 in words is "twenty trillion, four hundred fifty billion, four hundred two million, one hundred thirty-four thousand, five hundred sixty-four".