21433236470261 has 24 divisors (see below), whose sum is σ = 27199721519424. Its totient is φ = 16700863058880.

The previous prime is 21433236470251. The next prime is 21433236470267. The reversal of 21433236470261 is 16207463233412.

It is not a de Polignac number, because 21433236470261 - 2⁶ = 21433236470197 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21433236470267) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26110856 + ... + 26919198.

It is an arithmetic number, because the mean of its divisors is an integer number (1133321729976).

Almost surely, 2^{21433236470261} is an apocalyptic number.

It is an amenable number.

21433236470261 is a deficient number, since it is larger than the sum of its proper divisors (5766485049163).

21433236470261 is a wasteful number, since it uses less digits than its factorization.

21433236470261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 857561 (or 857554 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 44.

The spelling of 21433236470261 in words is "twenty-one trillion, four hundred thirty-three billion, two hundred thirty-six million, four hundred seventy thousand, two hundred sixty-one".