21025023453441 has 12 divisors (see below), whose sum is σ = 34707975224832. Its totient is φ = 12014299116216.

The previous prime is 21025023453437. The next prime is 21025023453461. The reversal of 21025023453441 is 14435432052012.

It is a happy number.

21025023453441 is a `hidden beast` number, since 2 + 1 + 0 + 2 + 50 + 2 + 34 + 534 + 41 = 666.

It is not a de Polignac number, because 21025023453441 - 2² = 21025023453437 is a prime.

It is a super-2 number, since 2×21025023453441² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21025023453396 and 21025023453405.

It is not an unprimeable number, because it can be changed into a prime (21025023453461) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 166865265441 + ... + 166865265566.

It is an arithmetic number, because the mean of its divisors is an integer number (2892331268736).

Almost surely, 2^{21025023453441} is an apocalyptic number.

21025023453441 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

21025023453441 is a deficient number, since it is larger than the sum of its proper divisors (13682951771391).

21025023453441 is a wasteful number, since it uses less digits than its factorization.

21025023453441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333730531020 (or 333730531017 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 36.

The spelling of 21025023453441 in words is "twenty-one trillion, twenty-five billion, twenty-three million, four hundred fifty-three thousand, four hundred forty-one".