20152040 has 32 divisors (see below), whose sum is σ = 46116000. Its totient is φ = 7923264.

The previous prime is 20152039. The next prime is 20152051. The reversal of 20152040 is 4025102.

It is a super-2 number, since 2×20152040² = 812209432323200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1910 + ... + 6629.

It is an arithmetic number, because the mean of its divisors is an integer number (1441125).

Almost surely, 2^20152040 is an apocalyptic number.

20152040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20152040 is an abundant number, since it is smaller than the sum of its proper divisors (25963960).

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

20152040 is a wasteful number, since it uses less digits than its factorization.

20152040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8609 (or 8605 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 14.

The square root of 20152040 is about 4489.1023601607. The cubic root of 20152040 is about 272.1278594377.

Adding to 20152040 its reverse (4025102), we get a palindrome (24177142).

The spelling of 20152040 in words is "twenty million, one hundred fifty-two thousand, forty".