21623463998 has 8 divisors (see below), whose sum is σ = 32505251808. Its totient is φ = 10788380064.

The previous prime is 21623463991. The next prime is 21623464013. The reversal of 21623463998 is 89936432612.

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

It is a super-3 number, since 3×21623463998³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21623463991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11674811 + ... + 11676662.

It is an arithmetic number, because the mean of its divisors is an integer number (4063156476).

Almost surely, 2^21623463998 is an apocalyptic number.

21623463998 is a deficient number, since it is larger than the sum of its proper divisors (10881787810).

21623463998 is a wasteful number, since it uses less digits than its factorization.

21623463998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23351938.

The product of its digits is 3359232, while the sum is 53.

The spelling of 21623463998 in words is "twenty-one billion, six hundred twenty-three million, four hundred sixty-three thousand, nine hundred ninety-eight".