20932997 has 2 divisors, whose sum is σ = 20932998. Its totient is φ = 20932996.

The previous prime is 20932993. The next prime is 20933021. The reversal of 20932997 is 79923902.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18369796 + 2563201 = 4286^2 + 1601^2 .

It is a cyclic number.

It is not a de Polignac number, because 20932997 - 2² = 20932993 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20932991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10466498 + 10466499.

It is an arithmetic number, because the mean of its divisors is an integer number (10466499).

Almost surely, 2^20932997 is an apocalyptic number.

It is an amenable number.

20932997 is a deficient number, since it is larger than the sum of its proper divisors (1).

20932997 is an equidigital number, since it uses as much as digits as its factorization.

20932997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 61236, while the sum is 41.

The square root of 20932997 is about 4575.2592276285. The cubic root of 20932997 is about 275.5986824830.

The spelling of 20932997 in words is "twenty million, nine hundred thirty-two thousand, nine hundred ninety-seven".