2620308981 has 16 divisors (see below), whose sum is σ = 3679603200. Its totient is φ = 1654042608.

The previous prime is 2620308967. The next prime is 2620308997. The reversal of 2620308981 is 1898030262.

It is a happy number.

It is not a de Polignac number, because 2620308981 - 2²¹ = 2618211829 is a prime.

It is a super-2 number, since 2×2620308981² = 13732038311818516722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2620308941) 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, 104200 + ... + 126878.

It is an arithmetic number, because the mean of its divisors is an integer number (229975200).

Almost surely, 2^2620308981 is an apocalyptic number.

It is an amenable number.

2620308981 is a deficient number, since it is larger than the sum of its proper divisors (1059294219).

2620308981 is a wasteful number, since it uses less digits than its factorization.

2620308981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24728.

The product of its (nonzero) digits is 41472, while the sum is 39.

The square root of 2620308981 is about 51188.9537009695. The cubic root of 2620308981 is about 1378.6398734066.

The spelling of 2620308981 in words is "two billion, six hundred twenty million, three hundred eight thousand, nine hundred eighty-one".