20898788 has 12 divisors (see below), whose sum is σ = 36909180. Its totient is φ = 10353312.

The previous prime is 20898767. The next prime is 20898793. The reversal of 20898788 is 88789802.

It can be written as a sum of positive squares in 2 ways, for example, as 12730624 + 8168164 = 3568^2 + 2858^2 .

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, 23531 + ... + 24402.

It is an arithmetic number, because the mean of its divisors is an integer number (3075765).

Almost surely, 2^20898788 is an apocalyptic number.

It is an amenable number.

20898788 is a deficient number, since it is larger than the sum of its proper divisors (16010392).

20898788 is a wasteful number, since it uses less digits than its factorization.

20898788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48046 (or 48044 counting only the distinct ones).

The product of its (nonzero) digits is 516096, while the sum is 50.

The square root of 20898788 is about 4571.5192223155. The cubic root of 20898788 is about 275.4484715383.

The spelling of 20898788 in words is "twenty million, eight hundred ninety-eight thousand, seven hundred eighty-eight".