20510545 has 16 divisors (see below), whose sum is σ = 27179712. Its totient is φ = 14733760.

The previous prime is 20510531. The next prime is 20510563. The reversal of 20510545 is 54501502.

It is not a de Polignac number, because 20510545 - 2¹³ = 20502353 is a prime.

It is a Duffinian number.

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, 2319 + ... + 6811.

It is an arithmetic number, because the mean of its divisors is an integer number (1698732).

Almost surely, 2^20510545 is an apocalyptic number.

It is an amenable number.

20510545 is a deficient number, since it is larger than the sum of its proper divisors (6669167).

20510545 is a wasteful number, since it uses less digits than its factorization.

20510545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4592.

The product of its (nonzero) digits is 1000, while the sum is 22.

The square root of 20510545 is about 4528.8569197978. The cubic root of 20510545 is about 273.7321026921.

The spelling of 20510545 in words is "twenty million, five hundred ten thousand, five hundred forty-five".