20877078 has 8 divisors (see below), whose sum is σ = 41754168. Its totient is φ = 6959024.

The previous prime is 20877061. The next prime is 20877079. The reversal of 20877078 is 87077802.

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

20877078 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20877079) 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, 1739751 + ... + 1739762.

It is an arithmetic number, because the mean of its divisors is an integer number (5219271).

Almost surely, 2^20877078 is an apocalyptic number.

20877078 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.

20877078 is a wasteful number, since it uses less digits than its factorization.

20877078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3479518.

The product of its (nonzero) digits is 43904, while the sum is 39.

The square root of 20877078 is about 4569.1441211676. The cubic root of 20877078 is about 275.3530583782.

The spelling of 20877078 in words is "twenty million, eight hundred seventy-seven thousand, seventy-eight".