20898550 has 24 divisors (see below), whose sum is σ = 39702816. Its totient is φ = 8180640.

The previous prime is 20898533. The next prime is 20898569. The reversal of 20898550 is 5589802.

It is a happy number.

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, 2097 + ... + 6796.

It is an arithmetic number, because the mean of its divisors is an integer number (1654284).

Almost surely, 2^20898550 is an apocalyptic number.

20898550 is a deficient number, since it is larger than the sum of its proper divisors (18804266).

20898550 is a wasteful number, since it uses less digits than its factorization.

20898550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8952 (or 8947 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 37.

The square root of 20898550 is about 4571.4931915076. The cubic root of 20898550 is about 275.4474259117.

The spelling of 20898550 in words is "twenty million, eight hundred ninety-eight thousand, five hundred fifty".