20898995 has 16 divisors (see below), whose sum is σ = 27941760. Its totient is φ = 14899584.

The previous prime is 20898953. The next prime is 20899037. The reversal of 20898995 is 59989802.

It is an interprime number because it is at equal distance from previous prime (20898953) and next prime (20899037).

It is a cyclic number.

It is not a de Polignac number, because 20898995 - 2⁶ = 20898931 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3659 + ... + 7428.

It is an arithmetic number, because the mean of its divisors is an integer number (1746360).

Almost surely, 2^20898995 is an apocalyptic number.

20898995 is a deficient number, since it is larger than the sum of its proper divisors (7042765).

20898995 is a wasteful number, since it uses less digits than its factorization.

20898995 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11134.

The product of its (nonzero) digits is 466560, while the sum is 50.

The square root of 20898995 is about 4571.5418624355. The cubic root of 20898995 is about 275.4493809634.

The spelling of 20898995 in words is "twenty million, eight hundred ninety-eight thousand, nine hundred ninety-five".