721020723032 has 16 divisors (see below), whose sum is σ = 1351996630800. Its totient is φ = 360488288160.

The previous prime is 721020722999. The next prime is 721020723041. The reversal of 721020723032 is 230327020127.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 721020722986 and 721020723004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2619932 + ... + 2882027.

It is an arithmetic number, because the mean of its divisors is an integer number (84499789425).

Almost surely, 2^721020723032 is an apocalyptic number.

It is an amenable number.

721020723032 is a deficient number, since it is larger than the sum of its proper divisors (630975907768).

721020723032 is a wasteful number, since it uses less digits than its factorization.

721020723032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5518346 (or 5518342 counting only the distinct ones).

The product of its (nonzero) digits is 7056, while the sum is 29.

Adding to 721020723032 its reverse (230327020127), we get a palindrome (951347743159).

The spelling of 721020723032 in words is "seven hundred twenty-one billion, twenty million, seven hundred twenty-three thousand, thirty-two".