20790957 has 8 divisors (see below), whose sum is σ = 30241440. Its totient is φ = 12600560.

The previous prime is 20790947. The next prime is 20791007. The reversal of 20790957 is 75909702.

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

It is a cyclic number.

It is not a de Polignac number, because 20790957 - 2⁸ = 20790701 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20790937) 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, 314982 + ... + 315047.

It is an arithmetic number, because the mean of its divisors is an integer number (3780180).

Almost surely, 2^20790957 is an apocalyptic number.

It is an amenable number.

20790957 is a deficient number, since it is larger than the sum of its proper divisors (9450483).

20790957 is a wasteful number, since it uses less digits than its factorization.

20790957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 630043.

The product of its (nonzero) digits is 39690, while the sum is 39.

The square root of 20790957 is about 4559.7101881589. The cubic root of 20790957 is about 274.9739126769.

The spelling of 20790957 in words is "twenty million, seven hundred ninety thousand, nine hundred fifty-seven".