20877974 has 16 divisors (see below), whose sum is σ = 35193312. Its totient is φ = 9216768.

The previous prime is 20877971. The next prime is 20877991. The reversal of 20877974 is 47977802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20877971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16859 + ... + 18054.

It is an arithmetic number, because the mean of its divisors is an integer number (2199582).

Almost surely, 2^20877974 is an apocalyptic number.

20877974 is a deficient number, since it is larger than the sum of its proper divisors (14315338).

20877974 is a wasteful number, since it uses less digits than its factorization.

20877974 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34951.

The product of its (nonzero) digits is 197568, while the sum is 44.

The square root of 20877974 is about 4569.2421691129. The cubic root of 20877974 is about 275.3569975120.

The spelling of 20877974 in words is "twenty million, eight hundred seventy-seven thousand, nine hundred seventy-four".