21163475254 has 8 divisors (see below), whose sum is σ = 33125439600. Its totient is φ = 10121662056.

The previous prime is 21163475239. The next prime is 21163475257. The reversal of 21163475254 is 45257436112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21163475257) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 230037729 + ... + 230037820.

It is an arithmetic number, because the mean of its divisors is an integer number (4140679950).

Almost surely, 2^21163475254 is an apocalyptic number.

21163475254 is a deficient number, since it is larger than the sum of its proper divisors (11961964346).

21163475254 is a wasteful number, since it uses less digits than its factorization.

21163475254 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 460075574.

The product of its digits is 201600, while the sum is 40.

The spelling of 21163475254 in words is "twenty-one billion, one hundred sixty-three million, four hundred seventy-five thousand, two hundred fifty-four".