20968353424 has 20 divisors (see below), whose sum is σ = 41045014444. Its totient is φ = 10376091648.

The previous prime is 20968353383. The next prime is 20968353437. The reversal of 20968353424 is 42435386902.

It can be written as a sum of positive squares in 2 ways, for example, as 8146867600 + 12821485824 = 90260^2 + 113232^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6753717 + ... + 6756820.

Almost surely, 2^20968353424 is an apocalyptic number.

It is an amenable number.

20968353424 is a deficient number, since it is larger than the sum of its proper divisors (20076661020).

20968353424 is a wasteful number, since it uses less digits than its factorization.

20968353424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13510642 (or 13510636 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 46.

The spelling of 20968353424 in words is "twenty billion, nine hundred sixty-eight million, three hundred fifty-three thousand, four hundred twenty-four".