20899035 has 36 divisors (see below), whose sum is σ = 38505168. Its totient is φ = 10483968.

The previous prime is 20898953. The next prime is 20899037. The reversal of 20899035 is 53099802.

It is not a de Polignac number, because 20899035 - 2¹⁶ = 20833499 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20899037) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 12202 + ... + 13808.

It is an arithmetic number, because the mean of its divisors is an integer number (1069588).

Almost surely, 2^20899035 is an apocalyptic number.

20899035 is a deficient number, since it is larger than the sum of its proper divisors (17606133).

20899035 is a wasteful number, since it uses less digits than its factorization.

20899035 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1652 (or 1632 counting only the distinct ones).

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

The square root of 20899035 is about 4571.5462373250. The cubic root of 20899035 is about 275.4495566970.

The spelling of 20899035 in words is "twenty million, eight hundred ninety-nine thousand, thirty-five".