20743472 has 10 divisors (see below), whose sum is σ = 40190508. Its totient is φ = 10371728.

The previous prime is 20743469. The next prime is 20743483. The reversal of 20743472 is 27434702.

It is a super-2 number, since 2×20743472² = 860583261229568, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 648218 + ... + 648249.

Almost surely, 2^20743472 is an apocalyptic number.

It is an amenable number.

20743472 is a deficient number, since it is larger than the sum of its proper divisors (19447036).

20743472 is a wasteful number, since it uses less digits than its factorization.

20743472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1296475 (or 1296469 counting only the distinct ones).

The product of its (nonzero) digits is 9408, while the sum is 29.

The square root of 20743472 is about 4554.5001921177. The cubic root of 20743472 is about 274.7644131112.

The spelling of 20743472 in words is "twenty million, seven hundred forty-three thousand, four hundred seventy-two".