20750494 has 4 divisors (see below), whose sum is σ = 31125744. Its totient is φ = 10375246.

The previous prime is 20750479. The next prime is 20750537. The reversal of 20750494 is 49405702.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5187622 + ... + 5187625.

It is an arithmetic number, because the mean of its divisors is an integer number (7781436).

Almost surely, 2^20750494 is an apocalyptic number.

20750494 is a deficient number, since it is larger than the sum of its proper divisors (10375250).

20750494 is a wasteful number, since it uses less digits than its factorization.

20750494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10375249.

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 20750494 is about 4555.2710127939. The cubic root of 20750494 is about 274.7954136759.

The spelling of 20750494 in words is "twenty million, seven hundred fifty thousand, four hundred ninety-four".