21423424615733 has 4 divisors (see below), whose sum is σ = 24483913846560. Its totient is φ = 18362935384908.

The previous prime is 21423424615661. The next prime is 21423424615771. The reversal of 21423424615733 is 33751642432412.

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 a cyclic number.

It is not a de Polignac number, because 21423424615733 - 2³⁸ = 21148546708789 is a prime.

It is a super-2 number, since 2×21423424615733² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21423424615793) 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, 1530244615403 + ... + 1530244615416.

It is an arithmetic number, because the mean of its divisors is an integer number (6120978461640).

Almost surely, 2^{21423424615733} is an apocalyptic number.

It is an amenable number.

21423424615733 is a deficient number, since it is larger than the sum of its proper divisors (3060489230827).

21423424615733 is an equidigital number, since it uses as much as digits as its factorization.

21423424615733 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3060489230826.

The product of its digits is 2903040, while the sum is 47.

The spelling of 21423424615733 in words is "twenty-one trillion, four hundred twenty-three billion, four hundred twenty-four million, six hundred fifteen thousand, seven hundred thirty-three".