20810974 has 8 divisors (see below), whose sum is σ = 31279320. Its totient is φ = 10384536.

The previous prime is 20810897. The next prime is 20810981. The reversal of 20810974 is 47901802.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9204 + ... + 11239.

It is an arithmetic number, because the mean of its divisors is an integer number (3909915).

Almost surely, 2^20810974 is an apocalyptic number.

20810974 is a deficient number, since it is larger than the sum of its proper divisors (10468346).

20810974 is a wasteful number, since it uses less digits than its factorization.

20810974 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20954.

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 20810974 is about 4561.9046460881. The cubic root of 20810974 is about 275.0621303146.

The spelling of 20810974 in words is "twenty million, eight hundred ten thousand, nine hundred seventy-four".