20975662 has 4 divisors (see below), whose sum is σ = 31463496. Its totient is φ = 10487830.

The previous prime is 20975657. The next prime is 20975663. The reversal of 20975662 is 26657902.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20975663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5243914 + ... + 5243917.

It is an arithmetic number, because the mean of its divisors is an integer number (7865874).

Almost surely, 2^20975662 is an apocalyptic number.

20975662 is a deficient number, since it is larger than the sum of its proper divisors (10487834).

20975662 is a wasteful number, since it uses less digits than its factorization.

20975662 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10487833.

The product of its (nonzero) digits is 45360, while the sum is 37.

The square root of 20975662 is about 4579.9194316058. The cubic root of 20975662 is about 275.7857943790.

The spelling of 20975662 in words is "twenty million, nine hundred seventy-five thousand, six hundred sixty-two".