21174027072 has 112 divisors (see below), whose sum is σ = 61326320832. Its totient is φ = 6394286080.

The previous prime is 21174027067. The next prime is 21174027107. The reversal of 21174027072 is 27072047112.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 601708 + ... + 635924.

It is an arithmetic number, because the mean of its divisors is an integer number (547556436).

Almost surely, 2^21174027072 is an apocalyptic number.

21174027072 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21174027072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30663160416).

21174027072 is an abundant number, since it is smaller than the sum of its proper divisors (40152293760).

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

21174027072 is a wasteful number, since it uses less digits than its factorization.

21174027072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34536 (or 34526 counting only the distinct ones).

The product of its (nonzero) digits is 10976, while the sum is 33.

The spelling of 21174027072 in words is "twenty-one billion, one hundred seventy-four million, twenty-seven thousand, seventy-two".