20730748 has 24 divisors (see below), whose sum is σ = 39125520. Its totient is φ = 9578880.

The previous prime is 20730739. The next prime is 20730757. The reversal of 20730748 is 84703702.

It is an interprime number because it is at equal distance from previous prime (20730739) and next prime (20730757).

It is a congruent number.

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, 211 + ... + 6442.

It is an arithmetic number, because the mean of its divisors is an integer number (1630230).

Almost surely, 2^20730748 is an apocalyptic number.

It is an amenable number.

20730748 is a deficient number, since it is larger than the sum of its proper divisors (18394772).

20730748 is a wasteful number, since it uses less digits than its factorization.

20730748 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6717 (or 6715 counting only the distinct ones).

The product of its (nonzero) digits is 9408, while the sum is 31.

The square root of 20730748 is about 4553.1031176550. The cubic root of 20730748 is about 274.7082216586.

The spelling of 20730748 in words is "twenty million, seven hundred thirty thousand, seven hundred forty-eight".