21021631701468 has 48 divisors (see below), whose sum is σ = 49503342629664. Its totient is φ = 6942711393280.

The previous prime is 21021631701461. The next prime is 21021631701503. The reversal of 21021631701468 is 86410713612012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21021631701461) 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, 11414955 + ... + 13128002.

It is an arithmetic number, because the mean of its divisors is an integer number (1031319638118).

Almost surely, 2^{21021631701468} is an apocalyptic number.

It is an amenable number.

21021631701468 is an abundant number, since it is smaller than the sum of its proper divisors (28481710928196).

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

21021631701468 is a wasteful number, since it uses less digits than its factorization.

21021631701468 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24543622 (or 24543620 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 42.

The spelling of 21021631701468 in words is "twenty-one trillion, twenty-one billion, six hundred thirty-one million, seven hundred one thousand, four hundred sixty-eight".