20573690 has 16 divisors (see below), whose sum is σ = 37586592. Its totient is φ = 8106384.

The previous prime is 20573687. The next prime is 20573711. The reversal of 20573690 is 9637502.

It is a super-2 number, since 2×20573690² = 846553440432200, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14684 + ... + 16023.

It is an arithmetic number, because the mean of its divisors is an integer number (2349162).

Almost surely, 2^20573690 is an apocalyptic number.

20573690 is a deficient number, since it is larger than the sum of its proper divisors (17012902).

20573690 is a wasteful number, since it uses less digits than its factorization.

20573690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30781.

The product of its (nonzero) digits is 11340, while the sum is 32.

The square root of 20573690 is about 4535.8229683267. The cubic root of 20573690 is about 274.0127242923.

The spelling of 20573690 in words is "twenty million, five hundred seventy-three thousand, six hundred ninety".