18901589952 has 56 divisors (see below), whose sum is σ = 57154811776. Its totient is φ = 5400453888.

The previous prime is 18901589933. The next prime is 18901589989. The reversal of 18901589952 is 25998510981.

It is a tau number, because it is divible by the number of its divisors (56).

It is a junction number, because it is equal to n+sod(n) for n = 18901589892 and 18901589901.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7030498 + ... + 7033185.

Almost surely, 2^18901589952 is an apocalyptic number.

18901589952 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18901589952 is an abundant number, since it is smaller than the sum of its proper divisors (38253221824).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18901589952 is a wasteful number, since it uses less digits than its factorization.

18901589952 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14063705 (or 14063695 counting only the distinct ones).

The product of its (nonzero) digits is 2332800, while the sum is 57.

The spelling of 18901589952 in words is "eighteen billion, nine hundred one million, five hundred eighty-nine thousand, nine hundred fifty-two".