20293690 has 8 divisors (see below), whose sum is σ = 36528660. Its totient is φ = 8117472.

The previous prime is 20293687. The next prime is 20293703. The reversal of 20293690 is 9639202.

It can be written as a sum of positive squares in 2 ways, for example, as 20169081 + 124609 = 4491^2 + 353^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×20293690² = 823667707632200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1014675 + ... + 1014694.

Almost surely, 2^20293690 is an apocalyptic number.

20293690 is a deficient number, since it is larger than the sum of its proper divisors (16234970).

20293690 is a wasteful number, since it uses less digits than its factorization.

20293690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2029376.

The product of its (nonzero) digits is 5832, while the sum is 31.

The square root of 20293690 is about 4504.8518288619. The cubic root of 20293690 is about 272.7639728053.

The spelling of 20293690 in words is "twenty million, two hundred ninety-three thousand, six hundred ninety".