20763545 has 32 divisors (see below), whose sum is σ = 29393280. Its totient is φ = 13911040.

The previous prime is 20763541. The next prime is 20763551. The reversal of 20763545 is 54536702.

It is not a de Polignac number, because 20763545 - 2² = 20763541 is a prime.

It is a super-2 number, since 2×20763545² = 862249601934050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20763541) 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, 49346 + ... + 49764.

It is an arithmetic number, because the mean of its divisors is an integer number (918540).

Almost surely, 2^20763545 is an apocalyptic number.

It is an amenable number.

20763545 is a deficient number, since it is larger than the sum of its proper divisors (8629735).

20763545 is a wasteful number, since it uses less digits than its factorization.

20763545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 505.

The product of its (nonzero) digits is 25200, while the sum is 32.

The square root of 20763545 is about 4556.7033039249. The cubic root of 20763545 is about 274.8530123581.

The spelling of 20763545 in words is "twenty million, seven hundred sixty-three thousand, five hundred forty-five".