21472753620401 has 2 divisors, whose sum is σ = 21472753620402. Its totient is φ = 21472753620400.

The previous prime is 21472753620389. The next prime is 21472753620449. The reversal of 21472753620401 is 10402635727412.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18816508840000 + 2656244780401 = 4337800^2 + 1629799^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21472753620401 is a prime.

It is a super-2 number, since 2×21472753620401² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21472752620401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10736376810200 + 10736376810201.

It is an arithmetic number, because the mean of its divisors is an integer number (10736376810201).

Almost surely, 2^{21472753620401} is an apocalyptic number.

It is an amenable number.

21472753620401 is a deficient number, since it is larger than the sum of its proper divisors (1).

21472753620401 is an equidigital number, since it uses as much as digits as its factorization.

21472753620401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 564480, while the sum is 44.

The spelling of 21472753620401 in words is "twenty-one trillion, four hundred seventy-two billion, seven hundred fifty-three million, six hundred twenty thousand, four hundred one".