20938835 has 8 divisors (see below), whose sum is σ = 25156656. Its totient is φ = 16731040.

The previous prime is 20938831. The next prime is 20938837. The reversal of 20938835 is 53883902.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20938835 - 2² = 20938831 is a prime.

It is a super-2 number, since 2×20938835² = 876869622314450, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20938831) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3332 + ... + 7278.

It is an arithmetic number, because the mean of its divisors is an integer number (3144582).

Almost surely, 2^20938835 is an apocalyptic number.

20938835 is a deficient number, since it is larger than the sum of its proper divisors (4217821).

20938835 is a wasteful number, since it uses less digits than its factorization.

20938835 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5013.

The product of its (nonzero) digits is 51840, while the sum is 38.

The square root of 20938835 is about 4575.8971797889. The cubic root of 20938835 is about 275.6243006583.

The spelling of 20938835 in words is "twenty million, nine hundred thirty-eight thousand, eight hundred thirty-five".