20125502534 has 16 divisors (see below), whose sum is σ = 31236548400. Its totient is φ = 9713482464.

The previous prime is 20125502519. The next prime is 20125502557. The reversal of 20125502534 is 43520552102.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a junction number, because it is equal to n+sod(n) for n = 20125502497 and 20125502506.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 223577 + ... + 300395.

It is an arithmetic number, because the mean of its divisors is an integer number (1952284275).

Almost surely, 2^20125502534 is an apocalyptic number.

20125502534 is a deficient number, since it is larger than the sum of its proper divisors (11111045866).

20125502534 is a wasteful number, since it uses less digits than its factorization.

20125502534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81367.

The product of its (nonzero) digits is 12000, while the sum is 29.

The spelling of 20125502534 in words is "twenty billion, one hundred twenty-five million, five hundred two thousand, five hundred thirty-four".