42720423032 has 24 divisors (see below), whose sum is σ = 93178474560. Its totient is φ = 18308752560.

The previous prime is 42720423013. The next prime is 42720423043. The reversal of 42720423032 is 23032402724.

It is a junction number, because it is equal to n+sod(n) for n = 42720422986 and 42720423004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 54489944 + ... + 54490727.

It is an arithmetic number, because the mean of its divisors is an integer number (3882436440).

Almost surely, 2^42720423032 is an apocalyptic number.

It is an amenable number.

42720423032 is an abundant number, since it is smaller than the sum of its proper divisors (50458051528).

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

42720423032 is a wasteful number, since it uses less digits than its factorization.

42720423032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108980691 (or 108980680 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 29.

Adding to 42720423032 its reverse (23032402724), we get a palindrome (65752825756).

The spelling of 42720423032 in words is "forty-two billion, seven hundred twenty million, four hundred twenty-three thousand, thirty-two".