20801310 has 32 divisors (see below), whose sum is σ = 51535872. Its totient is φ = 5367840.

The previous prime is 20801243. The next prime is 20801317. The reversal of 20801310 is 1310802.

It is a happy number.

It is a super-2 number, since 2×20801310² = 865388995432200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 20801310.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20801317) 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, 10254 + ... + 12113.

It is an arithmetic number, because the mean of its divisors is an integer number (1610496).

Almost surely, 2^20801310 is an apocalyptic number.

20801310 is an abundant number, since it is smaller than the sum of its proper divisors (30734562).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20801310 is a wasteful number, since it uses less digits than its factorization.

20801310 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22408.

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 20801310 is about 4560.8453163860. The cubic root of 20801310 is about 275.0195468200.

The spelling of 20801310 in words is "twenty million, eight hundred one thousand, three hundred ten".