21067113857780 has 48 divisors (see below), whose sum is σ = 44280282239424. Its totient is φ = 8419354978560.

The previous prime is 21067113857749. The next prime is 21067113857789. The reversal of 21067113857780 is 8775831176012.

It is a super-2 number, since 2×21067113857780² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21067113857789) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 102222719 + ... + 102428601.

It is an arithmetic number, because the mean of its divisors is an integer number (922505879988).

Almost surely, 2^{21067113857780} is an apocalyptic number.

21067113857780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21067113857780 is an abundant number, since it is smaller than the sum of its proper divisors (23213168381644).

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

21067113857780 is a wasteful number, since it uses less digits than its factorization.

21067113857780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210416 (or 210414 counting only the distinct ones).

The product of its (nonzero) digits is 3951360, while the sum is 56.

The spelling of 21067113857780 in words is "twenty-one trillion, sixty-seven billion, one hundred thirteen million, eight hundred fifty-seven thousand, seven hundred eighty".