21850243631904 has 48 divisors (see below), whose sum is σ = 57357130404672. Its totient is φ = 7283383957248.

The previous prime is 21850243631873. The next prime is 21850243631911. The reversal of 21850243631904 is 40913634205812.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×21850243631904² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

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, 42913597 + ... + 43419779.

It is an arithmetic number, because the mean of its divisors is an integer number (1194940216764).

Almost surely, 2^{21850243631904} is an apocalyptic number.

21850243631904 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21850243631904 is an abundant number, since it is smaller than the sum of its proper divisors (35506886772768).

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

21850243631904 is a wasteful number, since it uses less digits than its factorization.

21850243631904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 955849 (or 955841 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 48.

The spelling of 21850243631904 in words is "twenty-one trillion, eight hundred fifty billion, two hundred forty-three million, six hundred thirty-one thousand, nine hundred four".