20020915 has 16 divisors (see below), whose sum is σ = 24837120. Its totient is φ = 15482880.

The previous prime is 20020901. The next prime is 20020937. The reversal of 20020915 is 51902002.

It is not a de Polignac number, because 20020915 - 2²³ = 11632307 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20020892 and 20020901.

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, 25651 + ... + 26419.

It is an arithmetic number, because the mean of its divisors is an integer number (1552320).

Almost surely, 2^20020915 is an apocalyptic number.

20020915 is a deficient number, since it is larger than the sum of its proper divisors (4816205).

20020915 is a wasteful number, since it uses less digits than its factorization.

20020915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 942.

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 20020915 is about 4474.4737120694. The cubic root of 20020915 is about 271.5363487697.

Adding to 20020915 its reverse (51902002), we get a palindrome (71922917).

It can be divided in two parts, 200 and 20915, that added together give a triangular number (21115 = T₂₀₅).

The spelling of 20020915 in words is "twenty million, twenty thousand, nine hundred fifteen".