20970515344 has 45 divisors (see below), whose sum is σ = 41692745649. Its totient is φ = 10217934720.

The previous prime is 20970515339. The next prime is 20970515369. The reversal of 20970515344 is 44351507902.

It is a happy number.

The square root of 20970515344 is 144812.

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

It can be written as a sum of positive squares in only one way, i.e., 1010476944 + 19960038400 = 31788^2 + 141280^2 .

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20970515297 and 20970515306.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 23748727 + ... + 23749609.

Almost surely, 2^20970515344 is an apocalyptic number.

20970515344 is the 144812-nd square number.

It is an amenable number.

20970515344 is a deficient number, since it is larger than the sum of its proper divisors (20722230305).

20970515344 is an frugal number, since it uses more digits than its factorization.

20970515344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1856 (or 926 counting only the distinct ones).

The product of its (nonzero) digits is 151200, while the sum is 40.

The spelling of 20970515344 in words is "twenty billion, nine hundred seventy million, five hundred fifteen thousand, three hundred forty-four".