20463765 has 32 divisors (see below), whose sum is σ = 37908480. Its totient is φ = 9232704.

The previous prime is 20463761. The next prime is 20463787. The reversal of 20463765 is 56736402.

It is not a de Polignac number, because 20463765 - 2² = 20463761 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20463761) 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, 7062 + ... + 9528.

It is an arithmetic number, because the mean of its divisors is an integer number (1184640).

Almost surely, 2^20463765 is an apocalyptic number.

It is an amenable number.

20463765 is a deficient number, since it is larger than the sum of its proper divisors (17444715).

20463765 is a wasteful number, since it uses less digits than its factorization.

20463765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2561.

The product of its (nonzero) digits is 30240, while the sum is 33.

The square root of 20463765 is about 4523.6893129392. The cubic root of 20463765 is about 273.5238368890.

The spelling of 20463765 in words is "twenty million, four hundred sixty-three thousand, seven hundred sixty-five".