20152020 has 48 divisors (see below), whose sum is σ = 64487808. Its totient is φ = 4606080.

The previous prime is 20152019. The next prime is 20152039. The reversal of 20152020 is 2025102.

It is a super-2 number, since 2×20152020² = 812207820160800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 20151987 and 20152005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23571 + ... + 24410.

It is an arithmetic number, because the mean of its divisors is an integer number (1343496).

Almost surely, 2^20152020 is an apocalyptic number.

20152020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20152020 is an abundant number, since it is smaller than the sum of its proper divisors (44335788).

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

20152020 is a wasteful number, since it uses less digits than its factorization.

20152020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48000 (or 47998 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 12.

The square root of 20152020 is about 4489.1001325433. The cubic root of 20152020 is about 272.1277694127.

Adding to 20152020 its reverse (2025102), we get a palindrome (22177122).

The spelling of 20152020 in words is "twenty million, one hundred fifty-two thousand, twenty".