20879398 has 8 divisors (see below), whose sum is σ = 31390200. Its totient is φ = 10416000.

The previous prime is 20879389. The next prime is 20879401. The reversal of 20879398 is 89397802.

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

It is a congruent 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, 10728 + ... + 12523.

It is an arithmetic number, because the mean of its divisors is an integer number (3923775).

Almost surely, 2^20879398 is an apocalyptic number.

20879398 is a deficient number, since it is larger than the sum of its proper divisors (10510802).

20879398 is a wasteful number, since it uses less digits than its factorization.

20879398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23702.

The product of its (nonzero) digits is 217728, while the sum is 46.

The square root of 20879398 is about 4569.3979909831. The cubic root of 20879398 is about 275.3632576892.

The spelling of 20879398 in words is "twenty million, eight hundred seventy-nine thousand, three hundred ninety-eight".