21213611546040 has 80 divisors (see below), whose sum is σ = 71301305485080. Its totient is φ = 5656963078080.

The previous prime is 21213611546027. The next prime is 21213611546041. The reversal of 21213611546040 is 4064511631212.

21213611546040 is a `hidden beast` number, since 2 + 1 + 2 + 1 + 36 + 1 + 15 + 4 + 604 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 21213611545986 and 21213611546004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21213611546041) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 3273702246 + ... + 3273708725.

Almost surely, 2^{21213611546040} is an apocalyptic number.

21213611546040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21213611546040 is an abundant number, since it is smaller than the sum of its proper divisors (50087693939040).

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

21213611546040 is a wasteful number, since it uses less digits than its factorization.

21213611546040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6547410994 (or 6547410981 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The spelling of 21213611546040 in words is "twenty-one trillion, two hundred thirteen billion, six hundred eleven million, five hundred forty-six thousand, forty".