20737493 has 8 divisors (see below), whose sum is σ = 24947520. Its totient is φ = 16839360.

The previous prime is 20737487. The next prime is 20737517. The reversal of 20737493 is 39473702.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20737493 - 2¹⁶ = 20671957 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 (20737403) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77828 + ... + 78093.

It is an arithmetic number, because the mean of its divisors is an integer number (3118440).

Almost surely, 2^20737493 is an apocalyptic number.

It is an amenable number.

20737493 is a deficient number, since it is larger than the sum of its proper divisors (4210027).

20737493 is a wasteful number, since it uses less digits than its factorization.

20737493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155947.

The product of its (nonzero) digits is 31752, while the sum is 35.

The square root of 20737493 is about 4553.8437610441. The cubic root of 20737493 is about 274.7380116439.

The spelling of 20737493 in words is "twenty million, seven hundred thirty-seven thousand, four hundred ninety-three".