20742496 has 24 divisors (see below), whose sum is σ = 41942880. Its totient is φ = 10090368.

The previous prime is 20742493. The next prime is 20742517. The reversal of 20742496 is 69424702.

It is a super-2 number, since 2×20742496² = 860502280620032, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20742493) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7576 + ... + 9943.

It is an arithmetic number, because the mean of its divisors is an integer number (1747620).

Almost surely, 2^20742496 is an apocalyptic number.

It is an amenable number.

20742496 is an abundant number, since it is smaller than the sum of its proper divisors (21200384).

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

20742496 is a wasteful number, since it uses less digits than its factorization.

20742496 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17566 (or 17558 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 34.

The square root of 20742496 is about 4554.3930440839. The cubic root of 20742496 is about 274.7601037350.

The spelling of 20742496 in words is "twenty million, seven hundred forty-two thousand, four hundred ninety-six".