20742337 has 24 divisors (see below), whose sum is σ = 27250560. Its totient is φ = 15593760.

The previous prime is 20742307. The next prime is 20742353. The reversal of 20742337 is 73324702.

It is not a de Polignac number, because 20742337 - 2⁷ = 20742209 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20742307) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14968 + ... + 16294.

It is an arithmetic number, because the mean of its divisors is an integer number (1135440).

Almost surely, 2^20742337 is an apocalyptic number.

It is an amenable number.

20742337 is a deficient number, since it is larger than the sum of its proper divisors (6508223).

20742337 is a wasteful number, since it uses less digits than its factorization.

20742337 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1381 (or 1374 counting only the distinct ones).

The product of its (nonzero) digits is 7056, while the sum is 28.

The square root of 20742337 is about 4554.3755883765. The cubic root of 20742337 is about 274.7594016824.

The spelling of 20742337 in words is "twenty million, seven hundred forty-two thousand, three hundred thirty-seven".