20730692 has 18 divisors (see below), whose sum is σ = 37493694. Its totient is φ = 10029120.

The previous prime is 20730623. The next prime is 20730719. The reversal of 20730692 is 29603702.

It can be written as a sum of positive squares in only one way, i.e., 20484676 + 246016 = 4526^2 + 496^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1148 + ... + 6540.

It is an arithmetic number, because the mean of its divisors is an integer number (2082983).

Almost surely, 2^20730692 is an apocalyptic number.

It is an amenable number.

20730692 is a deficient number, since it is larger than the sum of its proper divisors (16763002).

20730692 is a wasteful number, since it uses less digits than its factorization.

20730692 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5459 (or 5426 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 29.

The square root of 20730692 is about 4553.0969679988. The cubic root of 20730692 is about 274.7079743018.

The spelling of 20730692 in words is "twenty million, seven hundred thirty thousand, six hundred ninety-two".