21352913712 has 160 divisors (see below), whose sum is σ = 67790036160. Its totient is φ = 6392494080.

The previous prime is 21352913683. The next prime is 21352913737. The reversal of 21352913712 is 21731925312.

It is a happy number.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 156412 + ... + 259172.

It is an arithmetic number, because the mean of its divisors is an integer number (423687726).

Almost surely, 2^21352913712 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21352913712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33895018080).

21352913712 is an abundant number, since it is smaller than the sum of its proper divisors (46437122448).

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

21352913712 is a wasteful number, since it uses less digits than its factorization.

21352913712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102828 (or 102816 counting only the distinct ones).

The product of its digits is 22680, while the sum is 36.

The spelling of 21352913712 in words is "twenty-one billion, three hundred fifty-two million, nine hundred thirteen thousand, seven hundred twelve".