21890774766276 has 240 divisors, whose sum is σ = 62842325914368. Its totient is φ = 6604049491200.

The previous prime is 21890774766247. The next prime is 21890774766281. The reversal of 21890774766276 is 67266747709812.

21890774766276 is a `hidden beast` number, since 2 + 1 + 8 + 90 + 7 + 7 + 476 + 62 + 7 + 6 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 53926201 + ... + 54330623.

Almost surely, 2^{21890774766276} is an apocalyptic number.

21890774766276 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21890774766276, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31421162957184).

21890774766276 is an abundant number, since it is smaller than the sum of its proper divisors (40951551148092).

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

21890774766276 is a wasteful number, since it uses less digits than its factorization.

21890774766276 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 404704 (or 404693 counting only the distinct ones).

The product of its (nonzero) digits is 597445632, while the sum is 72.

The spelling of 21890774766276 in words is "twenty-one trillion, eight hundred ninety billion, seven hundred seventy-four million, seven hundred sixty-six thousand, two hundred seventy-six".