21603350423 has 8 divisors (see below), whose sum is σ = 22875420240. Its totient is φ = 20331423360.

The previous prime is 21603350383. The next prime is 21603350479. The reversal of 21603350423 is 32405330612.

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

It is not a de Polignac number, because 21603350423 - 2¹² = 21603346327 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21603350023) 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, 562313 + ... + 599501.

It is an arithmetic number, because the mean of its divisors is an integer number (2859427530).

Almost surely, 2^21603350423 is an apocalyptic number.

21603350423 is a deficient number, since it is larger than the sum of its proper divisors (1272069817).

21603350423 is a wasteful number, since it uses less digits than its factorization.

21603350423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71377.

The product of its (nonzero) digits is 12960, while the sum is 29.

The spelling of 21603350423 in words is "twenty-one billion, six hundred three million, three hundred fifty thousand, four hundred twenty-three".