1620272013 has 16 divisors (see below), whose sum is σ = 2172420096. Its totient is φ = 1074170160.

The previous prime is 1620271993. The next prime is 1620272039. The reversal of 1620272013 is 3102720261.

It is not a de Polignac number, because 1620272013 - 2¹⁸ = 1620009869 is a prime.

It is a super-2 number, since 2×1620272013² = 5250562792222144338, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1620272113) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 450420 + ... + 454002.

It is an arithmetic number, because the mean of its divisors is an integer number (135776256).

Almost surely, 2^1620272013 is an apocalyptic number.

It is an amenable number.

1620272013 is a deficient number, since it is larger than the sum of its proper divisors (552148083).

1620272013 is a wasteful number, since it uses less digits than its factorization.

1620272013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4384.

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 1620272013 is about 40252.6025618220. The cubic root of 1620272013 is about 1174.5260229244.

Adding to 1620272013 its reverse (3102720261), we get a palindrome (4722992274).

The spelling of 1620272013 in words is "one billion, six hundred twenty million, two hundred seventy-two thousand, thirteen".