20977366 has 8 divisors (see below), whose sum is σ = 31517064. Its totient is φ = 10471680.

The previous prime is 20977331. The next prime is 20977367. The reversal of 20977366 is 66377902.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20977367) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6900 + ... + 9463.

It is an arithmetic number, because the mean of its divisors is an integer number (3939633).

Almost surely, 2^20977366 is an apocalyptic number.

20977366 is a deficient number, since it is larger than the sum of its proper divisors (10539698).

20977366 is a wasteful number, since it uses less digits than its factorization.

20977366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17006.

The product of its (nonzero) digits is 95256, while the sum is 40.

The square root of 20977366 is about 4580.1054573012. The cubic root of 20977366 is about 275.7932621809.

The spelling of 20977366 in words is "twenty million, nine hundred seventy-seven thousand, three hundred sixty-six".