20150040 has 32 divisors (see below), whose sum is σ = 60450480. Its totient is φ = 5373312.

The previous prime is 20150033. The next prime is 20150059. The reversal of 20150040 is 4005102.

It is a super-2 number, since 2×20150040² = 812048224003200, 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 = 20149998 and 20150025.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 83839 + ... + 84078.

Almost surely, 2^20150040 is an apocalyptic number.

20150040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20150040 is an abundant number, since it is smaller than the sum of its proper divisors (40300440).

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

20150040 is a wasteful number, since it uses less digits than its factorization.

20150040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167931 (or 167927 counting only the distinct ones).

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

The square root of 20150040 is about 4488.8795929497. The cubic root of 20150040 is about 272.1188566481.

Adding to 20150040 its reverse (4005102), we get a palindrome (24155142).

The spelling of 20150040 in words is "twenty million, one hundred fifty thousand, forty".