20016240 has 40 divisors (see below), whose sum is σ = 62051088. Its totient is φ = 5337600.

The previous prime is 20016229. The next prime is 20016251. The reversal of 20016240 is 4261002.

It is an interprime number because it is at equal distance from previous prime (20016229) and next prime (20016251).

It is a tau number, because it is divible by the number of its divisors (40).

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41461 + ... + 41940.

Almost surely, 2^20016240 is an apocalyptic number.

20016240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20016240 is an abundant number, since it is smaller than the sum of its proper divisors (42034848).

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

20016240 is a wasteful number, since it uses less digits than its factorization.

20016240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83417 (or 83411 counting only the distinct ones).

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

The square root of 20016240 is about 4473.9512737624. The cubic root of 20016240 is about 271.5152120193.

Adding to 20016240 its reverse (4261002), we get a palindrome (24277242).

The spelling of 20016240 in words is "twenty million, sixteen thousand, two hundred forty".