20970320 has 40 divisors (see below), whose sum is σ = 55722624. Its totient is φ = 7189632.

The previous prime is 20970307. The next prime is 20970329. The reversal of 20970320 is 2307902.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20970329) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18164 + ... + 19283.

Almost surely, 2^20970320 is an apocalyptic number.

20970320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20970320 is an abundant number, since it is smaller than the sum of its proper divisors (34752304).

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

20970320 is a wasteful number, since it uses less digits than its factorization.

20970320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37467 (or 37461 counting only the distinct ones).

The product of its (nonzero) digits is 756, while the sum is 23.

The square root of 20970320 is about 4579.3361964372. The cubic root of 20970320 is about 275.7623803734.

The spelling of 20970320 in words is "twenty million, nine hundred seventy thousand, three hundred twenty".