21377338710 has 128 divisors (see below), whose sum is σ = 66468971520. Its totient is φ = 4272984576.

The previous prime is 21377338699. The next prime is 21377338711. The reversal of 21377338710 is 1783377312.

It is a super-2 number, since 2×21377338710² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21377338711) by changing a digit.

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 63 ways as a sum of consecutive naturals, for example, 154197 + ... + 257936.

It is an arithmetic number, because the mean of its divisors is an integer number (519288840).

Almost surely, 2^21377338710 is an apocalyptic number.

21377338710 is an abundant number, since it is smaller than the sum of its proper divisors (45091632810).

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

21377338710 is a wasteful number, since it uses less digits than its factorization.

21377338710 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 412182.

The product of its (nonzero) digits is 148176, while the sum is 42.

The spelling of 21377338710 in words is "twenty-one billion, three hundred seventy-seven million, three hundred thirty-eight thousand, seven hundred ten".