20763457 has 32 divisors (see below), whose sum is σ = 26127360. Its totient is φ = 16230720.

The previous prime is 20763437. The next prime is 20763487. The reversal of 20763457 is 75436702.

It is a happy number.

It is not a de Polignac number, because 20763457 - 2¹¹ = 20761409 is a prime.

It is a super-2 number, since 2×20763457² = 862242293181698, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20763437) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 193998 + ... + 194104.

It is an arithmetic number, because the mean of its divisors is an integer number (816480).

Almost surely, 2^20763457 is an apocalyptic number.

It is an amenable number.

20763457 is a deficient number, since it is larger than the sum of its proper divisors (5363903).

20763457 is a wasteful number, since it uses less digits than its factorization.

20763457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213.

The product of its (nonzero) digits is 35280, while the sum is 34.

The square root of 20763457 is about 4556.6936478109. The cubic root of 20763457 is about 274.8526240638.

The spelling of 20763457 in words is "twenty million, seven hundred sixty-three thousand, four hundred fifty-seven".