20366690 has 16 divisors (see below), whose sum is σ = 37843200. Its totient is φ = 7883760.

The previous prime is 20366683. The next prime is 20366699. The reversal of 20366690 is 9666302.

It is a super-2 number, since 2×20366690² = 829604123112200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20366699) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32540 + ... + 33159.

It is an arithmetic number, because the mean of its divisors is an integer number (2365200).

Almost surely, 2^20366690 is an apocalyptic number.

20366690 is a deficient number, since it is larger than the sum of its proper divisors (17476510).

20366690 is a wasteful number, since it uses less digits than its factorization.

20366690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65737.

The product of its (nonzero) digits is 11664, while the sum is 32.

The square root of 20366690 is about 4512.9469307759. The cubic root of 20366690 is about 273.0906415420.

The spelling of 20366690 in words is "twenty million, three hundred sixty-six thousand, six hundred ninety".