21361742700 has 72 divisors (see below), whose sum is σ = 65442342672. Its totient is φ = 5361377280.

The previous prime is 21361742687. The next prime is 21361742711. The reversal of 21361742700 is 724716312.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2089189 + ... + 2099388.

It is an arithmetic number, because the mean of its divisors is an integer number (908921426).

Almost surely, 2^21361742700 is an apocalyptic number.

21361742700 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21361742700 is an abundant number, since it is smaller than the sum of its proper divisors (44080599972).

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

21361742700 is a wasteful number, since it uses less digits than its factorization.

21361742700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4188611 (or 4188604 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 33.

The spelling of 21361742700 in words is "twenty-one billion, three hundred sixty-one million, seven hundred forty-two thousand, seven hundred".