20879550 has 36 divisors (see below), whose sum is σ = 56097600. Its totient is φ = 5567760.

The previous prime is 20879531. The next prime is 20879567. The reversal of 20879550 is 5597802.

20879550 is a `hidden beast` number, since 20 + 87 + 9 + 550 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 22750 + ... + 23649.

Almost surely, 2^20879550 is an apocalyptic number.

20879550 is an abundant number, since it is smaller than the sum of its proper divisors (35218050).

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

20879550 is a wasteful number, since it uses less digits than its factorization.

20879550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46417 (or 46409 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 36.

The square root of 20879550 is about 4569.4146233407. The cubic root of 20879550 is about 275.3639258936.

The spelling of 20879550 in words is "twenty million, eight hundred seventy-nine thousand, five hundred fifty".