20042123660 has 48 divisors (see below), whose sum is σ = 45652202400. Its totient is φ = 7346916864.

The previous prime is 20042123587. The next prime is 20042123671. The reversal of 20042123660 is 6632124002.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 241145 + ... + 313424.

It is an arithmetic number, because the mean of its divisors is an integer number (951087550).

Almost surely, 2^20042123660 is an apocalyptic number.

20042123660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20042123660 is an abundant number, since it is smaller than the sum of its proper divisors (25610078740).

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

20042123660 is a wasteful number, since it uses less digits than its factorization.

20042123660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 554730 (or 554728 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 26.

Adding to 20042123660 its reverse (6632124002), we get a palindrome (26674247662).

The spelling of 20042123660 in words is "twenty billion, forty-two million, one hundred twenty-three thousand, six hundred sixty".