21730814494032 has 80 divisors (see below), whose sum is σ = 64161240596352. Its totient is φ = 6208455966720.

The previous prime is 21730814494031. The next prime is 21730814494043. The reversal of 21730814494032 is 23049441803712.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21730814494031) 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, 4217008 + ... + 7825904.

Almost surely, 2^{21730814494032} is an apocalyptic number.

It is an amenable number.

21730814494032 is an abundant number, since it is smaller than the sum of its proper divisors (42430426102320).

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

21730814494032 is a wasteful number, since it uses less digits than its factorization.

21730814494032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3626836 (or 3626830 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 48.

The spelling of 21730814494032 in words is "twenty-one trillion, seven hundred thirty billion, eight hundred fourteen million, four hundred ninety-four thousand, thirty-two".