21327272477316 has 81 divisors (see below), whose sum is σ = 58377558733221. Its totient is φ = 6562126849824.

The previous prime is 21327272477257. The next prime is 21327272477333. The reversal of 21327272477316 is 61377427272312.

The square root of 21327272477316 is 4618146.

It is a perfect power (a square), and thus also a powerful number.

21327272477316 is a `hidden beast` number, since 2 + 1 + 3 + 2 + 72 + 72 + 477 + 31 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 3154921964100 + 18172350513216 = 1776210^2 + 4262904^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 360185785 + ... + 360244991.

Almost surely, 2^{21327272477316} is an apocalyptic number.

21327272477316 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

21327272477316 is the 4618146-th square number.

It is an amenable number.

21327272477316 is an abundant number, since it is smaller than the sum of its proper divisors (37050286255905).

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

21327272477316 is an frugal number, since it uses more digits than its factorization.

21327272477316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118450 (or 59225 counting only the distinct ones).

The product of its digits is 8297856, while the sum is 54.

The spelling of 21327272477316 in words is "twenty-one trillion, three hundred twenty-seven billion, two hundred seventy-two million, four hundred seventy-seven thousand, three hundred sixteen".