20995502 has 16 divisors (see below), whose sum is σ = 35286192. Its totient is φ = 9285120.

The previous prime is 20995489. The next prime is 20995517. The reversal of 20995502 is 20559902.

It is a super-2 number, since 2×20995502² = 881622208464008, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12083 + ... + 13710.

It is an arithmetic number, because the mean of its divisors is an integer number (2205387).

Almost surely, 2^20995502 is an apocalyptic number.

20995502 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20995502 is a deficient number, since it is larger than the sum of its proper divisors (14290690).

20995502 is a wasteful number, since it uses less digits than its factorization.

20995502 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25843.

The product of its (nonzero) digits is 8100, while the sum is 32.

The square root of 20995502 is about 4582.0848966382. The cubic root of 20995502 is about 275.8727183888.

Subtracting from 20995502 its reverse (20559902), we obtain a square (435600 = 660²).

The spelling of 20995502 in words is "twenty million, nine hundred ninety-five thousand, five hundred two".