20933901 has 12 divisors (see below), whose sum is σ = 30282720. Its totient is φ = 13935240.

The previous prime is 20933893. The next prime is 20933921. The reversal of 20933901 is 10933902.

It is not a de Polignac number, because 20933901 - 2³ = 20933893 is a prime.

It is a super-2 number, since 2×20933901² = 876456422155602, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20933921) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7006 + ... + 9536.

It is an arithmetic number, because the mean of its divisors is an integer number (2523560).

Almost surely, 2^20933901 is an apocalyptic number.

It is an amenable number.

20933901 is a deficient number, since it is larger than the sum of its proper divisors (9348819).

20933901 is a wasteful number, since it uses less digits than its factorization.

20933901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3456 (or 3453 counting only the distinct ones).

The product of its (nonzero) digits is 1458, while the sum is 27.

The square root of 20933901 is about 4575.3580187784. The cubic root of 20933901 is about 275.6026497063.

Subtracting from 20933901 its reverse (10933902), we obtain a palindrome (9999999).

The spelling of 20933901 in words is "twenty million, nine hundred thirty-three thousand, nine hundred one".