20880946 has 4 divisors (see below), whose sum is σ = 31321422. Its totient is φ = 10440472.

The previous prime is 20880911. The next prime is 20880953. The reversal of 20880946 is 64908802.

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., 20566225 + 314721 = 4535^2 + 561^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5220235 + ... + 5220238.

Almost surely, 2^20880946 is an apocalyptic number.

20880946 is a deficient number, since it is larger than the sum of its proper divisors (10440476).

20880946 is a wasteful number, since it uses less digits than its factorization.

20880946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10440475.

The product of its (nonzero) digits is 27648, while the sum is 37.

The square root of 20880946 is about 4569.5673755838. The cubic root of 20880946 is about 275.3700626713.

The spelling of 20880946 in words is "twenty million, eight hundred eighty thousand, nine hundred forty-six".