20291006 has 4 divisors (see below), whose sum is σ = 30436512. Its totient is φ = 10145502.

The previous prime is 20290999. The next prime is 20291053. The reversal of 20291006 is 60019202.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5072750 + ... + 5072753.

It is an arithmetic number, because the mean of its divisors is an integer number (7609128).

Almost surely, 2^20291006 is an apocalyptic number.

20291006 is a deficient number, since it is larger than the sum of its proper divisors (10145506).

20291006 is a wasteful number, since it uses less digits than its factorization.

20291006 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10145505.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 20291006 is about 4504.5539179812. The cubic root of 20291006 is about 272.7519472154.

The spelling of 20291006 in words is "twenty million, two hundred ninety-one thousand, six".