20514761 has 4 divisors (see below), whose sum is σ = 21069252. Its totient is φ = 19960272.

The previous prime is 20514757. The next prime is 20514787. The reversal of 20514761 is 16741502.

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

It can be written as a sum of positive squares in 2 ways, for example, as 15366400 + 5148361 = 3920^2 + 2269^2 .

It is a cyclic number.

It is not a de Polignac number, because 20514761 - 2² = 20514757 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20514761.

It is not an unprimeable number, because it can be changed into a prime (20514751) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 277190 + ... + 277263.

It is an arithmetic number, because the mean of its divisors is an integer number (5267313).

Almost surely, 2^20514761 is an apocalyptic number.

It is an amenable number.

20514761 is a deficient number, since it is larger than the sum of its proper divisors (554491).

20514761 is an equidigital number, since it uses as much as digits as its factorization.

20514761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 554490.

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 20514761 is about 4529.3223554965. The cubic root of 20514761 is about 273.7508568741.

The spelling of 20514761 in words is "twenty million, five hundred fourteen thousand, seven hundred sixty-one".