20750493 has 8 divisors (see below), whose sum is σ = 27748000. Its totient is φ = 13793328.

The previous prime is 20750479. The next prime is 20750537. The reversal of 20750493 is 39405702.

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

It is not a de Polignac number, because 20750493 - 2⁵ = 20750461 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20750493.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20750423) 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, 8863 + ... + 10956.

It is an arithmetic number, because the mean of its divisors is an integer number (3468500).

Almost surely, 2^20750493 is an apocalyptic number.

It is an amenable number.

20750493 is a deficient number, since it is larger than the sum of its proper divisors (6997507).

20750493 is a wasteful number, since it uses less digits than its factorization.

20750493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20171.

The product of its (nonzero) digits is 7560, while the sum is 30.

The square root of 20750493 is about 4555.2709030309. The cubic root of 20750493 is about 274.7954092616.

The spelling of 20750493 in words is "twenty million, seven hundred fifty thousand, four hundred ninety-three".