20877378 has 8 divisors (see below), whose sum is σ = 41754768. Its totient is φ = 6959124.

The previous prime is 20877347. The next prime is 20877391. The reversal of 20877378 is 87377802.

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

20877378 is an admirable number.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax 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, 1739776 + ... + 1739787.

It is an arithmetic number, because the mean of its divisors is an integer number (5219346).

Almost surely, 2^20877378 is an apocalyptic number.

20877378 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

20877378 is a wasteful number, since it uses less digits than its factorization.

20877378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3479568.

The product of its (nonzero) digits is 131712, while the sum is 42.

The square root of 20877378 is about 4569.1769499550. The cubic root of 20877378 is about 275.3543772972.

The spelling of 20877378 in words is "twenty million, eight hundred seventy-seven thousand, three hundred seventy-eight".