20525531554 has 16 divisors (see below), whose sum is σ = 33612706656. Its totient is φ = 9322711200.

The previous prime is 20525531531. The next prime is 20525531569. The reversal of 20525531554 is 45513552502.

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, 324072 + ... + 382195.

It is an arithmetic number, because the mean of its divisors is an integer number (2100794166).

Almost surely, 2^20525531554 is an apocalyptic number.

20525531554 is a deficient number, since it is larger than the sum of its proper divisors (13087175102).

20525531554 is a wasteful number, since it uses less digits than its factorization.

20525531554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 707601.

The product of its (nonzero) digits is 150000, while the sum is 37.

The spelling of 20525531554 in words is "twenty billion, five hundred twenty-five million, five hundred thirty-one thousand, five hundred fifty-four".