21362357616072 has 32 divisors (see below), whose sum is σ = 58260975317280. Its totient is φ = 6473441701760.

The previous prime is 21362357616031. The next prime is 21362357616121. The reversal of 21362357616072 is 27061675326312.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40459010373 + ... + 40459010900.

It is an arithmetic number, because the mean of its divisors is an integer number (1820655478665).

Almost surely, 2^{21362357616072} is an apocalyptic number.

21362357616072 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21362357616072 is an abundant number, since it is smaller than the sum of its proper divisors (36898617701208).

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

21362357616072 is a wasteful number, since it uses less digits than its factorization.

21362357616072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80918021293 (or 80918021289 counting only the distinct ones).

The product of its (nonzero) digits is 3810240, while the sum is 51.

The spelling of 21362357616072 in words is "twenty-one trillion, three hundred sixty-two billion, three hundred fifty-seven million, six hundred sixteen thousand, seventy-two".