20970318 has 16 divisors (see below), whose sum is σ = 42063696. Its totient is φ = 6969600.

The previous prime is 20970307. The next prime is 20970329. The reversal of 20970318 is 81307902.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20970307) and next prime (20970329).

It is a super-2 number, since 2×20970318² = 879508474042248, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2833 + ... + 7068.

It is an arithmetic number, because the mean of its divisors is an integer number (2628981).

Almost surely, 2^20970318 is an apocalyptic number.

20970318 is an abundant number, since it is smaller than the sum of its proper divisors (21093378).

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

20970318 is a wasteful number, since it uses less digits than its factorization.

20970318 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10259.

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 20970318 is about 4579.3359780649. The cubic root of 20970318 is about 275.7623716067.

The spelling of 20970318 in words is "twenty million, nine hundred seventy thousand, three hundred eighteen".