20454665 has 16 divisors (see below), whose sum is σ = 30602880. Its totient is φ = 12750720.

The previous prime is 20454653. The next prime is 20454671. The reversal of 20454665 is 56645402.

It is not a de Polignac number, because 20454665 - 2⁴ = 20454649 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26180 + ... + 26949.

It is an arithmetic number, because the mean of its divisors is an integer number (1912680).

Almost surely, 2^20454665 is an apocalyptic number.

It is an amenable number.

20454665 is a deficient number, since it is larger than the sum of its proper divisors (10148215).

20454665 is a wasteful number, since it uses less digits than its factorization.

20454665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53152.

The product of its (nonzero) digits is 28800, while the sum is 32.

The square root of 20454665 is about 4522.6833848944. The cubic root of 20454665 is about 273.4832865803.

The spelling of 20454665 in words is "twenty million, four hundred fifty-four thousand, six hundred sixty-five".