20898026 has 4 divisors (see below), whose sum is σ = 31347042. Its totient is φ = 10449012.

The previous prime is 20897993. The next prime is 20898041. The reversal of 20898026 is 62089802.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 62089802 = 2 ⋅31044901.

It can be written as a sum of positive squares in only one way, i.e., 17230801 + 3667225 = 4151^2 + 1915^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5224505 + ... + 5224508.

Almost surely, 2^20898026 is an apocalyptic number.

20898026 is a deficient number, since it is larger than the sum of its proper divisors (10449016).

20898026 is a wasteful number, since it uses less digits than its factorization.

20898026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10449015.

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 20898026 is about 4571.4358794584. The cubic root of 20898026 is about 275.4451237479.

The spelling of 20898026 in words is "twenty million, eight hundred ninety-eight thousand, twenty-six".