20899053 has 80 divisors (see below), whose sum is σ = 39029760. Its totient is φ = 10886400.

The previous prime is 20899051. The next prime is 20899057. The reversal of 20899053 is 35099802.

It is not a de Polignac number, because 20899053 - 2¹ = 20899051 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20898999 and 20899017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20899051) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 509713 + ... + 509753.

It is an arithmetic number, because the mean of its divisors is an integer number (487872).

Almost surely, 2^20899053 is an apocalyptic number.

It is an amenable number.

20899053 is a deficient number, since it is larger than the sum of its proper divisors (18130707).

20899053 is a wasteful number, since it uses less digits than its factorization.

20899053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120 (or 111 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 36.

The square root of 20899053 is about 4571.5482060239. The cubic root of 20899053 is about 275.4496357771.

The spelling of 20899053 in words is "twenty million, eight hundred ninety-nine thousand, fifty-three".