20533730 has 16 divisors (see below), whose sum is σ = 42240960. Its totient is φ = 7040112.

The previous prime is 20533729. The next prime is 20533753. The reversal of 20533730 is 3733502.

It is a junction number, because it is equal to n+sod(n) for n = 20533696 and 20533705.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 146600 + ... + 146739.

It is an arithmetic number, because the mean of its divisors is an integer number (2640060).

Almost surely, 2^20533730 is an apocalyptic number.

20533730 is an abundant number, since it is smaller than the sum of its proper divisors (21707230).

20533730 is a wasteful number, since it uses less digits than its factorization.

20533730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 293353.

The product of its (nonzero) digits is 1890, while the sum is 23.

The square root of 20533730 is about 4531.4158935150. The cubic root of 20533730 is about 273.8352055750.

The spelling of 20533730 in words is "twenty million, five hundred thirty-three thousand, seven hundred thirty".