20746560 has 56 divisors (see below), whose sum is σ = 65873376. Its totient is φ = 5532160.

The previous prime is 20746559. The next prime is 20746589. The reversal of 20746560 is 6564702.

It is a Harshad number since it is a multiple of its sum of digits (30).

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, 9846 + ... + 11765.

Almost surely, 2^20746560 is an apocalyptic number.

20746560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20746560 is an abundant number, since it is smaller than the sum of its proper divisors (45126816).

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

20746560 is a wasteful number, since it uses less digits than its factorization.

20746560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21631 (or 21621 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 30.

The square root of 20746560 is about 4554.8391848670. The cubic root of 20746560 is about 274.7780468045.

The spelling of 20746560 in words is "twenty million, seven hundred forty-six thousand, five hundred sixty".