21373606142220 has 48 divisors (see below), whose sum is σ = 59929332503040. Its totient is φ = 5691701132736.

The previous prime is 21373606142201. The next prime is 21373606142269. The reversal of 21373606142220 is 2224160637312.

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, 247680622 + ... + 247766901.

It is an arithmetic number, because the mean of its divisors is an integer number (1248527760480).

Almost surely, 2^{21373606142220} is an apocalyptic number.

21373606142220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21373606142220 is an abundant number, since it is smaller than the sum of its proper divisors (38555726360820).

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

21373606142220 is a wasteful number, since it uses less digits than its factorization.

21373606142220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 495448254 (or 495448252 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 39.

Adding to 21373606142220 its reverse (2224160637312), we get a palindrome (23597766779532).

The spelling of 21373606142220 in words is "twenty-one trillion, three hundred seventy-three billion, six hundred six million, one hundred forty-two thousand, two hundred twenty".