920220013 has 8 divisors (see below), whose sum is σ = 976787640. Its totient is φ = 863923200.

The previous prime is 920220001. The next prime is 920220023. The reversal of 920220013 is 310022029.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 774341929 + 145878084 = 27827^2 + 12078^2 .

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 920220013 - 2²⁹ = 383349101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (920220023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60678 + ... + 74311.

It is an arithmetic number, because the mean of its divisors is an integer number (122098455).

Almost surely, 2^920220013 is an apocalyptic number.

It is an amenable number.

920220013 is a deficient number, since it is larger than the sum of its proper divisors (56567627).

920220013 is a wasteful number, since it uses less digits than its factorization.

920220013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135407.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 920220013 is about 30335.1283663017. The cubic root of 920220013 is about 972.6663498167. Note that the first 3 decimals are identical.

The spelling of 920220013 in words is "nine hundred twenty million, two hundred twenty thousand, thirteen".