21707293062 has 128 divisors (see below), whose sum is σ = 54389422080. Its totient is φ = 5623188480.

The previous prime is 21707293061. The next prime is 21707293087. The reversal of 21707293062 is 26039270712.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 21707293062.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21707293061) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 12132864 + ... + 12134652.

It is an arithmetic number, because the mean of its divisors is an integer number (424917360).

Almost surely, 2^21707293062 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21707293062, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27194711040).

21707293062 is an abundant number, since it is smaller than the sum of its proper divisors (32682129018).

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

21707293062 is a wasteful number, since it uses less digits than its factorization.

21707293062 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2198.

The product of its (nonzero) digits is 63504, while the sum is 39.

The spelling of 21707293062 in words is "twenty-one billion, seven hundred seven million, two hundred ninety-three thousand, sixty-two".