20297005 has 8 divisors (see below), whose sum is σ = 24480000. Its totient is φ = 16155216.

The previous prime is 20296987. The next prime is 20297027. The reversal of 20297005 is 50079202.

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

It is a cyclic number.

It is not a de Polignac number, because 20297005 - 2⁵ = 20296973 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9205 + ... + 11194.

It is an arithmetic number, because the mean of its divisors is an integer number (3060000).

Almost surely, 2^20297005 is an apocalyptic number.

It is an amenable number.

20297005 is a deficient number, since it is larger than the sum of its proper divisors (4182995).

20297005 is a wasteful number, since it uses less digits than its factorization.

20297005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20603.

The product of its (nonzero) digits is 1260, while the sum is 25.

The square root of 20297005 is about 4505.2197504672. The cubic root of 20297005 is about 272.7788241103.

It can be divided in two parts, 20 and 297005, that added together give a square (297025 = 545²).

The spelling of 20297005 in words is "twenty million, two hundred ninety-seven thousand, five".