16240020 has 24 divisors (see below), whose sum is σ = 45472224. Its totient is φ = 4330656.

The previous prime is 16240009. The next prime is 16240027. The reversal of 16240020 is 2004261.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16240027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 135274 + ... + 135393.

It is an arithmetic number, because the mean of its divisors is an integer number (1894676).

Almost surely, 2^16240020 is an apocalyptic number.

16240020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16240020 is an abundant number, since it is smaller than the sum of its proper divisors (29232204).

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

16240020 is a wasteful number, since it uses less digits than its factorization.

16240020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270679 (or 270677 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 16240020 is about 4029.8908173795. The cubic root of 16240020 is about 253.2379873575.

Adding to 16240020 its reverse (2004261), we get a palindrome (18244281).

The spelling of 16240020 in words is "sixteen million, two hundred forty thousand, twenty".