20072870 has 16 divisors (see below), whose sum is σ = 37108368. Its totient is φ = 7812000.

The previous prime is 20072867. The next prime is 20072917. The reversal of 20072870 is 7827002.

It is a super-2 number, since 2×20072870² = 805840220073800, which contains 22 as substring.

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, 26756 + ... + 27495.

It is an arithmetic number, because the mean of its divisors is an integer number (2319273).

Almost surely, 2^20072870 is an apocalyptic number.

20072870 is a deficient number, since it is larger than the sum of its proper divisors (17035498).

20072870 is a wasteful number, since it uses less digits than its factorization.

20072870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54295.

The product of its (nonzero) digits is 1568, while the sum is 26.

The square root of 20072870 is about 4480.2756611619. The cubic root of 20072870 is about 271.7710281081.

Adding to 20072870 its reverse (7827002), we get a palindrome (27899872).

The spelling of 20072870 in words is "twenty million, seventy-two thousand, eight hundred seventy".