21673624001 has 4 divisors (see below), whose sum is σ = 21695945904. Its totient is φ = 21651302100.

The previous prime is 21673623989. The next prime is 21673624013. The reversal of 21673624001 is 10042637612.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (21673623989) and next prime (21673624013).

It is a cyclic number.

It is not a de Polignac number, because 21673624001 - 2³⁴ = 4493754817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21673626001) 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, 11159495 + ... + 11161436.

It is an arithmetic number, because the mean of its divisors is an integer number (5423986476).

Almost surely, 2^21673624001 is an apocalyptic number.

It is an amenable number.

21673624001 is a deficient number, since it is larger than the sum of its proper divisors (22321903).

21673624001 is an equidigital number, since it uses as much as digits as its factorization.

21673624001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22321902.

The product of its (nonzero) digits is 12096, while the sum is 32.

The spelling of 21673624001 in words is "twenty-one billion, six hundred seventy-three million, six hundred twenty-four thousand, one".