18878721026 has 8 divisors (see below), whose sum is σ = 30892452624. Its totient is φ = 8581236820.

The previous prime is 18878721007. The next prime is 18878721053. The reversal of 18878721026 is 62012787881.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×18878721026² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 429061820 + ... + 429061863.

It is an arithmetic number, because the mean of its divisors is an integer number (3861556578).

Almost surely, 2^18878721026 is an apocalyptic number.

18878721026 is a deficient number, since it is larger than the sum of its proper divisors (12013731598).

18878721026 is a wasteful number, since it uses less digits than its factorization.

18878721026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 858123696.

The product of its (nonzero) digits is 602112, while the sum is 50.

The spelling of 18878721026 in words is "eighteen billion, eight hundred seventy-eight million, seven hundred twenty-one thousand, twenty-six".