20690883 has 10 divisors (see below), whose sum is σ = 30908724. Its totient is φ = 13793868.

The previous prime is 20690849. The next prime is 20690897. The reversal of 20690883 is 38809602.

It is not a de Polignac number, because 20690883 - 2¹⁸ = 20428739 is a prime.

It is a super-2 number, since 2×20690883² = 856225278639378, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20690843) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 127641 + ... + 127802.

Almost surely, 2^20690883 is an apocalyptic number.

20690883 is a deficient number, since it is larger than the sum of its proper divisors (10217841).

20690883 is an equidigital number, since it uses as much as digits as its factorization.

20690883 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255455 (or 255446 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 20690883 is about 4548.7232274562. The cubic root of 20690883 is about 274.5320217056.

The spelling of 20690883 in words is "twenty million, six hundred ninety thousand, eight hundred eighty-three".