18906523012 has 24 divisors (see below), whose sum is σ = 35655728472. Its totient is φ = 8720160000.

The previous prime is 18906522977. The next prime is 18906523067. The reversal of 18906523012 is 21032560981.

It can be written as a sum of positive squares in 4 ways, for example, as 488233216 + 18418289796 = 22096^2 + 135714^2 .

It is a super-2 number, since 2×18906523012² (a number of 21 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

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, 45739 + ... + 199762.

It is an arithmetic number, because the mean of its divisors is an integer number (1485655353).

Almost surely, 2^18906523012 is an apocalyptic number.

It is an amenable number.

18906523012 is a deficient number, since it is larger than the sum of its proper divisors (16749205460).

18906523012 is a wasteful number, since it uses less digits than its factorization.

18906523012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 246999 (or 246997 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 37.

The spelling of 18906523012 in words is "eighteen billion, nine hundred six million, five hundred twenty-three thousand, twelve".