18521888950 has 24 divisors (see below), whose sum is σ = 34472380680. Its totient is φ = 7404096000.

The previous prime is 18521888933. The next prime is 18521888953. The reversal of 18521888950 is 5988812581.

It is a super-2 number, since 2×18521888950² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18521888891 and 18521888900.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18521888953) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 35640 + ... + 195739.

It is an arithmetic number, because the mean of its divisors is an integer number (1436349195).

Almost surely, 2^18521888950 is an apocalyptic number.

18521888950 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18521888950 is a deficient number, since it is larger than the sum of its proper divisors (15950491730).

18521888950 is a wasteful number, since it uses less digits than its factorization.

18521888950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232992 (or 232987 counting only the distinct ones).

The product of its (nonzero) digits is 1843200, while the sum is 55.

The spelling of 18521888950 in words is "eighteen billion, five hundred twenty-one million, eight hundred eighty-eight thousand, nine hundred fifty".