21418471106720 has 24 divisors (see below), whose sum is σ = 50601137990004. Its totient is φ = 8567388442624.

The previous prime is 21418471106693. The next prime is 21418471106803. The reversal of 21418471106720 is 2760117481412.

It can be written as a sum of positive squares in 2 ways, for example, as 20213332613776 + 1205138492944 = 4495924^2 + 1097788^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66932722049 + ... + 66932722368.

Almost surely, 2^{21418471106720} is an apocalyptic number.

21418471106720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21418471106720 is an abundant number, since it is smaller than the sum of its proper divisors (29182666883284).

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

21418471106720 is a wasteful number, since it uses less digits than its factorization.

21418471106720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133865444432 (or 133865444424 counting only the distinct ones).

The product of its (nonzero) digits is 150528, while the sum is 44.

The spelling of 21418471106720 in words is "twenty-one trillion, four hundred eighteen billion, four hundred seventy-one million, one hundred six thousand, seven hundred twenty".