20513125434 has 16 divisors (see below), whose sum is σ = 41041306080. Its totient is φ = 6835199280.

The previous prime is 20513125411. The next prime is 20513125541. The reversal of 20513125434 is 43452131502.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 609549 + ... + 642320.

It is an arithmetic number, because the mean of its divisors is an integer number (2565081630).

Almost surely, 2^20513125434 is an apocalyptic number.

20513125434 is an abundant number, since it is smaller than the sum of its proper divisors (20528180646).

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

20513125434 is a wasteful number, since it uses less digits than its factorization.

20513125434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1254605.

The product of its (nonzero) digits is 14400, while the sum is 30.

Adding to 20513125434 its reverse (43452131502), we get a palindrome (63965256936).

The spelling of 20513125434 in words is "twenty billion, five hundred thirteen million, one hundred twenty-five thousand, four hundred thirty-four".