20963758 has 4 divisors (see below), whose sum is σ = 31445640. Its totient is φ = 10481878.

The previous prime is 20963753. The next prime is 20963773. The reversal of 20963758 is 85736902.

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

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 20963758.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20963753) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5240938 + ... + 5240941.

It is an arithmetic number, because the mean of its divisors is an integer number (7861410).

Almost surely, 2^20963758 is an apocalyptic number.

20963758 is a deficient number, since it is larger than the sum of its proper divisors (10481882).

20963758 is a wasteful number, since it uses less digits than its factorization.

20963758 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10481881.

The product of its (nonzero) digits is 90720, while the sum is 40.

The square root of 20963758 is about 4578.6196609895. The cubic root of 20963758 is about 275.7336136606.

The spelling of 20963758 in words is "twenty million, nine hundred sixty-three thousand, seven hundred fifty-eight".