21417235704 has 32 divisors (see below), whose sum is σ = 59492322000. Its totient is φ = 7139078496.

The previous prime is 21417235687. The next prime is 21417235729. The reversal of 21417235704 is 40753271412.

21417235704 is a `hidden beast` number, since 2 + 1 + 417 + 235 + 7 + 0 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49576719 + ... + 49577150.

Almost surely, 2^21417235704 is an apocalyptic number.

21417235704 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21417235704 is an abundant number, since it is smaller than the sum of its proper divisors (38075086296).

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

21417235704 is a wasteful number, since it uses less digits than its factorization.

21417235704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99153884 (or 99153874 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 36.

The spelling of 21417235704 in words is "twenty-one billion, four hundred seventeen million, two hundred thirty-five thousand, seven hundred four".