20940515 has 16 divisors (see below), whose sum is σ = 27011232. Its totient is φ = 15527424.

The previous prime is 20940499. The next prime is 20940533. The reversal of 20940515 is 51504902.

It is a cyclic number.

It is not a de Polignac number, because 20940515 - 2⁴ = 20940499 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, 3857 + ... + 7533.

It is an arithmetic number, because the mean of its divisors is an integer number (1688202).

Almost surely, 2^20940515 is an apocalyptic number.

20940515 is a deficient number, since it is larger than the sum of its proper divisors (6070717).

20940515 is a wasteful number, since it uses less digits than its factorization.

20940515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3766.

The product of its (nonzero) digits is 1800, while the sum is 26.

The square root of 20940515 is about 4576.0807466652. The cubic root of 20940515 is about 275.6316719127.

The spelling of 20940515 in words is "twenty million, nine hundred forty thousand, five hundred fifteen".