20425513552 has 10 divisors (see below), whose sum is σ = 39574432538. Its totient is φ = 10212756768.

The previous prime is 20425513501. The next prime is 20425513567. The reversal of 20425513552 is 25531552402.

It can be written as a sum of positive squares in only one way, i.e., 15849802816 + 4575710736 = 125896^2 + 67644^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 638297283 + ... + 638297314.

Almost surely, 2^20425513552 is an apocalyptic number.

It is an amenable number.

20425513552 is a deficient number, since it is larger than the sum of its proper divisors (19148918986).

20425513552 is a wasteful number, since it uses less digits than its factorization.

20425513552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1276594605 (or 1276594599 counting only the distinct ones).

The product of its (nonzero) digits is 60000, while the sum is 34.

The spelling of 20425513552 in words is "twenty billion, four hundred twenty-five million, five hundred thirteen thousand, five hundred fifty-two".