20952997 has 8 divisors (see below), whose sum is σ = 23090144. Its totient is φ = 18890928.

The previous prime is 20952983. The next prime is 20953001. The reversal of 20952997 is 79925902.

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 20952997 - 2²³ = 12564389 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20952937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18183 + ... + 19300.

It is an arithmetic number, because the mean of its divisors is an integer number (2886268).

Almost surely, 2^20952997 is an apocalyptic number.

It is an amenable number.

20952997 is a deficient number, since it is larger than the sum of its proper divisors (2137147).

20952997 is a wasteful number, since it uses less digits than its factorization.

20952997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37539.

The product of its (nonzero) digits is 102060, while the sum is 43.

The square root of 20952997 is about 4577.4443743207. Note that the first 3 decimals coincide. The cubic root of 20952997 is about 275.6864262359.

The spelling of 20952997 in words is "twenty million, nine hundred fifty-two thousand, nine hundred ninety-seven".