20700947 has 8 divisors (see below), whose sum is σ = 21034944. Its totient is φ = 20369128.

The previous prime is 20700929. The next prime is 20700949. The reversal of 20700947 is 74900702.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20700947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20700949) 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, 36488 + ... + 37050.

It is an arithmetic number, because the mean of its divisors is an integer number (2629368).

Almost surely, 2^20700947 is an apocalyptic number.

20700947 is a deficient number, since it is larger than the sum of its proper divisors (333997).

20700947 is an equidigital number, since it uses as much as digits as its factorization.

20700947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1089.

The product of its (nonzero) digits is 3528, while the sum is 29.

The square root of 20700947 is about 4549.8293374587. The cubic root of 20700947 is about 274.5765250815.

The spelling of 20700947 in words is "twenty million, seven hundred thousand, nine hundred forty-seven".