20290846 has 4 divisors (see below), whose sum is σ = 30436272. Its totient is φ = 10145422.

The previous prime is 20290819. The next prime is 20290847. The reversal of 20290846 is 64809202.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20290847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5072710 + ... + 5072713.

It is an arithmetic number, because the mean of its divisors is an integer number (7609068).

Almost surely, 2^20290846 is an apocalyptic number.

20290846 is a deficient number, since it is larger than the sum of its proper divisors (10145426).

20290846 is a wasteful number, since it uses less digits than its factorization.

20290846 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10145425.

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 20290846 is about 4504.5361581410. The cubic root of 20290846 is about 272.7512303062.

The spelling of 20290846 in words is "twenty million, two hundred ninety thousand, eight hundred forty-six".