21163474623 has 8 divisors (see below), whose sum is σ = 29190999600. Its totient is φ = 13622466368.

The previous prime is 21163474613. The next prime is 21163474639. The reversal of 21163474623 is 32647436112.

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

It is a cyclic number.

It is not a de Polignac number, because 21163474623 - 2¹³ = 21163466431 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21163474613) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 121629078 + ... + 121629251.

It is an arithmetic number, because the mean of its divisors is an integer number (3648874950).

Almost surely, 2^21163474623 is an apocalyptic number.

21163474623 is a deficient number, since it is larger than the sum of its proper divisors (8027524977).

21163474623 is a wasteful number, since it uses less digits than its factorization.

21163474623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243258361.

The product of its digits is 145152, while the sum is 39.

The spelling of 21163474623 in words is "twenty-one billion, one hundred sixty-three million, four hundred seventy-four thousand, six hundred twenty-three".