20973662 has 4 divisors (see below), whose sum is σ = 31460496. Its totient is φ = 10486830.

The previous prime is 20973653. The next prime is 20973679. The reversal of 20973662 is 26637902.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 26637902 = 2 ⋅13318951.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5243414 + ... + 5243417.

It is an arithmetic number, because the mean of its divisors is an integer number (7865124).

Almost surely, 2^20973662 is an apocalyptic number.

20973662 is a deficient number, since it is larger than the sum of its proper divisors (10486834).

20973662 is a wasteful number, since it uses less digits than its factorization.

20973662 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10486833.

The product of its (nonzero) digits is 27216, while the sum is 35.

The square root of 20973662 is about 4579.7010819485. The cubic root of 20973662 is about 275.7770288373. Note that the first 3 decimals are identical.

The spelling of 20973662 in words is "twenty million, nine hundred seventy-three thousand, six hundred sixty-two".