20650995 has 48 divisors (see below), whose sum is σ = 37464960. Its totient is φ = 10513152.

The previous prime is 20650979. The next prime is 20650997. The reversal of 20650995 is 59905602.

It is not a de Polignac number, because 20650995 - 2⁴ = 20650979 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20650997) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 131457 + ... + 131613.

It is an arithmetic number, because the mean of its divisors is an integer number (780520).

Almost surely, 2^20650995 is an apocalyptic number.

20650995 is a deficient number, since it is larger than the sum of its proper divisors (16813965).

20650995 is a wasteful number, since it uses less digits than its factorization.

20650995 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284 (or 281 counting only the distinct ones).

The product of its (nonzero) digits is 24300, while the sum is 36.

The square root of 20650995 is about 4544.3365852454. The cubic root of 20650995 is about 274.3554934304.

The spelling of 20650995 in words is "twenty million, six hundred fifty thousand, nine hundred ninety-five".