20878674 has 32 divisors (see below), whose sum is σ = 42771456. Its totient is φ = 6792720.

The previous prime is 20878667. The next prime is 20878681. The reversal of 20878674 is 47687802.

It is an interprime number because it is at equal distance from previous prime (20878667) and next prime (20878681).

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 66979 + ... + 67289.

It is an arithmetic number, because the mean of its divisors is an integer number (1336608).

Almost surely, 2^20878674 is an apocalyptic number.

20878674 is an abundant number, since it is smaller than the sum of its proper divisors (21892782).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20878674 is a wasteful number, since it uses less digits than its factorization.

20878674 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 550.

The product of its (nonzero) digits is 150528, while the sum is 42.

The square root of 20878674 is about 4569.3187676064. The cubic root of 20878674 is about 275.3600748819.

The spelling of 20878674 in words is "twenty million, eight hundred seventy-eight thousand, six hundred seventy-four".