71920020 has 48 divisors (see below), whose sum is σ = 203938560. Its totient is φ = 18934656.

The previous prime is 71920019. The next prime is 71920033. The reversal of 71920020 is 2002917.

It is a happy number.

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 15 ways as a sum of consecutive naturals, for example, 2847 + ... + 12326.

It is an arithmetic number, because the mean of its divisors is an integer number (4248720).

Almost surely, 2^71920020 is an apocalyptic number.

It is an amenable number.

71920020 is an abundant number, since it is smaller than the sum of its proper divisors (132018540).

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

71920020 is a wasteful number, since it uses less digits than its factorization.

71920020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15264 (or 15262 counting only the distinct ones).

The product of its (nonzero) digits is 252, while the sum is 21.

The square root of 71920020 is about 8480.5671980122. The cubic root of 71920020 is about 415.8626657738.

Adding to 71920020 its reverse (2002917), we get a palindrome (73922937).

The spelling of 71920020 in words is "seventy-one million, nine hundred twenty thousand, twenty".