20070240 has 48 divisors (see below), whose sum is σ = 63222768. Its totient is φ = 5351936.

The previous prime is 20070229. The next prime is 20070257. The reversal of 20070240 is 4207002.

It is a tau number, because it is divible by the number of its divisors (48).

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 polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20427 + ... + 21386.

It is an arithmetic number, because the mean of its divisors is an integer number (1317141).

Almost surely, 2^20070240 is an apocalyptic number.

20070240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20070240 is an abundant number, since it is smaller than the sum of its proper divisors (43152528).

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

20070240 is a wasteful number, since it uses less digits than its factorization.

20070240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41831 (or 41823 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 15.

The square root of 20070240 is about 4479.9821428216. The cubic root of 20070240 is about 271.7591582057.

Adding to 20070240 its reverse (4207002), we get a palindrome (24277242).

The spelling of 20070240 in words is "twenty million, seventy thousand, two hundred forty".