20150540 has 12 divisors (see below), whose sum is σ = 42316176. Its totient is φ = 8060208.

The previous prime is 20150513. The next prime is 20150569. The reversal of 20150540 is 4505102.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 503744 + ... + 503783.

It is an arithmetic number, because the mean of its divisors is an integer number (3526348).

Almost surely, 2^20150540 is an apocalyptic number.

20150540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20150540 is an abundant number, since it is smaller than the sum of its proper divisors (22165636).

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

20150540 is a wasteful number, since it uses less digits than its factorization.

20150540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1007536 (or 1007534 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 17.

The square root of 20150540 is about 4488.9352857888. The cubic root of 20150540 is about 272.1211074014.

Adding to 20150540 its reverse (4505102), we get a palindrome (24655642).

The spelling of 20150540 in words is "twenty million, one hundred fifty thousand, five hundred forty".