20158925506 has 16 divisors (see below), whose sum is σ = 31609185984. Its totient is φ = 9624088144.

The previous prime is 20158925491. The next prime is 20158925537. The reversal of 20158925506 is 60552985102.

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, 363301 + ... + 415096.

It is an arithmetic number, because the mean of its divisors is an integer number (1975574124).

Almost surely, 2^20158925506 is an apocalyptic number.

20158925506 is a deficient number, since it is larger than the sum of its proper divisors (11450260478).

20158925506 is a wasteful number, since it uses less digits than its factorization.

20158925506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 778985.

The product of its (nonzero) digits is 216000, while the sum is 43.

The spelling of 20158925506 in words is "twenty billion, one hundred fifty-eight million, nine hundred twenty-five thousand, five hundred six".