20733630 has 16 divisors (see below), whose sum is σ = 49760784. Its totient is φ = 5528960.

The previous prime is 20733613. The next prime is 20733631. The reversal of 20733630 is 3633702.

It is a self number, because there is not a number n which added to its sum of digits gives 20733630.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20733631) 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, 345531 + ... + 345590.

It is an arithmetic number, because the mean of its divisors is an integer number (3110049).

Almost surely, 2^20733630 is an apocalyptic number.

20733630 is an abundant number, since it is smaller than the sum of its proper divisors (29027154).

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

20733630 is a wasteful number, since it uses less digits than its factorization.

20733630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 691131.

The product of its (nonzero) digits is 2268, while the sum is 24.

The square root of 20733630 is about 4553.4195941073. The cubic root of 20733630 is about 274.7209510981.

The spelling of 20733630 in words is "twenty million, seven hundred thirty-three thousand, six hundred thirty".