21436833607 has 16 divisors (see below), whose sum is σ = 24614297920. Its totient is φ = 18288281088.

The previous prime is 21436833601. The next prime is 21436833629. The reversal of 21436833607 is 70633863412.

It is not a de Polignac number, because 21436833607 - 2¹⁵ = 21436800839 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 (21436833601) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1950973 + ... + 1961929.

It is an arithmetic number, because the mean of its divisors is an integer number (1538393620).

Almost surely, 2^21436833607 is an apocalyptic number.

21436833607 is a deficient number, since it is larger than the sum of its proper divisors (3177464313).

21436833607 is a wasteful number, since it uses less digits than its factorization.

21436833607 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12250.

The product of its (nonzero) digits is 435456, while the sum is 43.

The spelling of 21436833607 in words is "twenty-one billion, four hundred thirty-six million, eight hundred thirty-three thousand, six hundred seven".