21031005067180 has 48 divisors (see below), whose sum is σ = 46342792984320. Its totient is φ = 8001692059328.

The previous prime is 21031005067147. The next prime is 21031005067181. The reversal of 21031005067180 is 8176050013012.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (21031005067181) 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, 127625974 + ... + 127790653.

It is an arithmetic number, because the mean of its divisors is an integer number (965474853840).

Almost surely, 2^{21031005067180} is an apocalyptic number.

21031005067180 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21031005067180 is an abundant number, since it is smaller than the sum of its proper divisors (25311787917140).

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

21031005067180 is a wasteful number, since it uses less digits than its factorization.

21031005067180 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255416838 (or 255416836 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 34.

The spelling of 21031005067180 in words is "twenty-one trillion, thirty-one billion, five million, sixty-seven thousand, one hundred eighty".