21254354005401 has 12 divisors (see below), whose sum is σ = 33491709342000. Its totient is φ = 12881426669880.

The previous prime is 21254354005331. The next prime is 21254354005517. The reversal of 21254354005401 is 10450045345212.

21254354005401 is a `hidden beast` number, since 2 + 1 + 25 + 43 + 54 + 0 + 0 + 540 + 1 = 666.

It is not a de Polignac number, because 21254354005401 - 2²⁶ = 21254286896537 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21254354005301) 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, 107345222151 + ... + 107345222348.

It is an arithmetic number, because the mean of its divisors is an integer number (2790975778500).

Almost surely, 2^{21254354005401} is an apocalyptic number.

It is an amenable number.

21254354005401 is a deficient number, since it is larger than the sum of its proper divisors (12237355336599).

21254354005401 is a wasteful number, since it uses less digits than its factorization.

21254354005401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214690444516 (or 214690444513 counting only the distinct ones).

The product of its (nonzero) digits is 96000, while the sum is 36.

The spelling of 21254354005401 in words is "twenty-one trillion, two hundred fifty-four billion, three hundred fifty-four million, five thousand, four hundred one".