20980426 has 4 divisors (see below), whose sum is σ = 31470642. Its totient is φ = 10490212.

The previous prime is 20980417. The next prime is 20980433. The reversal of 20980426 is 62408902.

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

It can be written as a sum of positive squares in only one way, i.e., 12852225 + 8128201 = 3585^2 + 2851^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5245105 + ... + 5245108.

Almost surely, 2^20980426 is an apocalyptic number.

20980426 is a deficient number, since it is larger than the sum of its proper divisors (10490216).

20980426 is a wasteful number, since it uses less digits than its factorization.

20980426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10490215.

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

The square root of 20980426 is about 4580.4394985634. The cubic root of 20980426 is about 275.8066716552.

The spelling of 20980426 in words is "twenty million, nine hundred eighty thousand, four hundred twenty-six".