20516398 has 24 divisors (see below), whose sum is σ = 37038600. Its totient is φ = 8488368.

The previous prime is 20516387. The next prime is 20516417. The reversal of 20516398 is 89361502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 768 + ... + 6451.

It is an arithmetic number, because the mean of its divisors is an integer number (1543275).

Almost surely, 2^20516398 is an apocalyptic number.

20516398 is a deficient number, since it is larger than the sum of its proper divisors (16522202).

20516398 is a wasteful number, since it uses less digits than its factorization.

20516398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7264 (or 7257 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 20516398 is about 4529.5030632510. The cubic root of 20516398 is about 273.7581381066.

The spelling of 20516398 in words is "twenty million, five hundred sixteen thousand, three hundred ninety-eight".