21900901079040 has 192 divisors, whose sum is σ = 73753447622400. Its totient is φ = 5532859072512.

The previous prime is 21900901079017. The next prime is 21900901079051. The reversal of 21900901079040 is 4097010900912.

It is a tau number, because it is divible by the number of its divisors (192).

It is a junction number, because it is equal to n+sod(n) for n = 21900901078983 and 21900901079001.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18177372 + ... + 19344731.

It is an arithmetic number, because the mean of its divisors is an integer number (384132539700).

Almost surely, 2^{21900901079040} is an apocalyptic number.

21900901079040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21900901079040 is an abundant number, since it is smaller than the sum of its proper divisors (51852546543360).

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

21900901079040 is a wasteful number, since it uses less digits than its factorization.

21900901079040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37522152 (or 37522132 counting only the distinct ones).

The product of its (nonzero) digits is 40824, while the sum is 42.

Adding to 21900901079040 its reverse (4097010900912), we get a palindrome (25997911979952).

The spelling of 21900901079040 in words is "twenty-one trillion, nine hundred billion, nine hundred one million, seventy-nine thousand, forty".