13902020 has 48 divisors (see below), whose sum is σ = 32961600. Its totient is φ = 4878720.

The previous prime is 13902019. The next prime is 13902023. The reversal of 13902020 is 2020931.

13902020 = T₁₂₁ + T₁₂₂ + ... + T₄₃₉.

It is a self number, because there is not a number n which added to its sum of digits gives 13902020.

It is not an unprimeable number, because it can be changed into a prime (13902023) 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, 5291 + ... + 7469.

It is an arithmetic number, because the mean of its divisors is an integer number (686700).

Almost surely, 2^13902020 is an apocalyptic number.

13902020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13902020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16480800).

13902020 is an abundant number, since it is smaller than the sum of its proper divisors (19059580).

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

13902020 is a wasteful number, since it uses less digits than its factorization.

13902020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2228 (or 2226 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 13902020 is about 3728.5412697193. The cubic root of 13902020 is about 240.4506578811.

Adding to 13902020 its reverse (2020931), we get a palindrome (15922951).

The spelling of 13902020 in words is "thirteen million, nine hundred two thousand, twenty".