21417812260988 has 48 divisors (see below), whose sum is σ = 44081739824640. Its totient is φ = 8976715876800.

The previous prime is 21417812260987. The next prime is 21417812261009. The reversal of 21417812260988 is 88906221871412.

It is a super-2 number, since 2×21417812260988² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21417812260987) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19846328 + ... + 20897663.

It is an arithmetic number, because the mean of its divisors is an integer number (918369579680).

Almost surely, 2^{21417812260988} is an apocalyptic number.

It is an amenable number.

21417812260988 is an abundant number, since it is smaller than the sum of its proper divisors (22663927563652).

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

21417812260988 is a wasteful number, since it uses less digits than its factorization.

21417812260988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40744938 (or 40744936 counting only the distinct ones).

The product of its (nonzero) digits is 6193152, while the sum is 59.

The spelling of 21417812260988 in words is "twenty-one trillion, four hundred seventeen billion, eight hundred twelve million, two hundred sixty thousand, nine hundred eighty-eight".