188661262720020 has 24 divisors (see below), whose sum is σ = 528251535616224. Its totient is φ = 50309670058656.

The previous prime is 188661262719991. The next prime is 188661262720031. The reversal of 188661262720020 is 20027262166881.

It is a super-2 number, since 2×188661262720020² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1572177189274 + ... + 1572177189393.

It is an arithmetic number, because the mean of its divisors is an integer number (22010480650676).

Almost surely, 2^{188661262720020} is an apocalyptic number.

188661262720020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

188661262720020 is an abundant number, since it is smaller than the sum of its proper divisors (339590272896204).

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

188661262720020 is a wasteful number, since it uses less digits than its factorization.

188661262720020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3144354378679 (or 3144354378677 counting only the distinct ones).

The product of its (nonzero) digits is 1548288, while the sum is 51.

The spelling of 188661262720020 in words is "one hundred eighty-eight trillion, six hundred sixty-one billion, two hundred sixty-two million, seven hundred twenty thousand, twenty".