20340744 has 16 divisors (see below), whose sum is σ = 50851920. Its totient is φ = 6780240.

The previous prime is 20340739. The next prime is 20340751. The reversal of 20340744 is 44704302.

It is a Harshad number since it is a multiple of its sum of digits (24), and also a Moran number because the ratio is a prime number: 847531 = 20340744 / (2 + 0 + 3 + 4 + 0 + 7 + 4 + 4).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 423742 + ... + 423789.

It is an arithmetic number, because the mean of its divisors is an integer number (3178245).

Almost surely, 2^20340744 is an apocalyptic number.

20340744 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20340744 is an abundant number, since it is smaller than the sum of its proper divisors (30511176).

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

20340744 is a wasteful number, since it uses less digits than its factorization.

20340744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 847540 (or 847536 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 24.

The square root of 20340744 is about 4510.0713963307. The cubic root of 20340744 is about 272.9746249678.

The spelling of 20340744 in words is "twenty million, three hundred forty thousand, seven hundred forty-four".