21417812260986 has 16 divisors (see below), whose sum is σ = 45090131076000. Its totient is φ = 6763519661328.

The previous prime is 21417812260931. The next prime is 21417812260987. The reversal of 21417812260986 is 68906221871412.

It is a Harshad number since it is a multiple of its sum of digits (57).

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 7 ways as a sum of consecutive naturals, for example, 93937772961 + ... + 93937773188.

It is an arithmetic number, because the mean of its divisors is an integer number (2818133192250).

Almost surely, 2^{21417812260986} is an apocalyptic number.

21417812260986 is an abundant number, since it is smaller than the sum of its proper divisors (23672318815014).

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

21417812260986 is a wasteful number, since it uses less digits than its factorization.

21417812260986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187875546173.

The product of its (nonzero) digits is 4644864, while the sum is 57.

The spelling of 21417812260986 in words is "twenty-one trillion, four hundred seventeen billion, eight hundred twelve million, two hundred sixty thousand, nine hundred eighty-six".