20633740 has 24 divisors (see below), whose sum is σ = 43433712. Its totient is φ = 8233920.

The previous prime is 20633729. The next prime is 20633741. The reversal of 20633740 is 4733602.

It is not an unprimeable number, because it can be changed into a prime (20633741) 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, 9867 + ... + 11773.

It is an arithmetic number, because the mean of its divisors is an integer number (1809738).

Almost surely, 2^20633740 is an apocalyptic number.

20633740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20633740 is an abundant number, since it is smaller than the sum of its proper divisors (22799972).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20633740 is a wasteful number, since it uses less digits than its factorization.

20633740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2457 (or 2455 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 25.

The square root of 20633740 is about 4542.4376715592. The cubic root of 20633740 is about 274.2790592900.

The spelling of 20633740 in words is "twenty million, six hundred thirty-three thousand, seven hundred forty".