21994273762860 has 192 divisors, whose sum is σ = 78443973780480. Its totient is φ = 4482512732160.

The previous prime is 21994273762847. The next prime is 21994273762949. The reversal of 21994273762860 is 6826737249912.

It is a hoax number, since the sum of its digits (66) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 21994273762791 and 21994273762800.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 80928301 + ... + 81199620.

It is an arithmetic number, because the mean of its divisors is an integer number (408562363440).

Almost surely, 2^{21994273762860} is an apocalyptic number.

21994273762860 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21994273762860 is an abundant number, since it is smaller than the sum of its proper divisors (56449700017620).

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

21994273762860 is a wasteful number, since it uses less digits than its factorization.

21994273762860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162127976 (or 162127974 counting only the distinct ones).

The product of its (nonzero) digits is 109734912, while the sum is 66.

The spelling of 21994273762860 in words is "twenty-one trillion, nine hundred ninety-four billion, two hundred seventy-three million, seven hundred sixty-two thousand, eight hundred sixty".