20464723869471 has 48 divisors (see below), whose sum is σ = 33800282949888. Its totient is φ = 11688159600000.

The previous prime is 20464723869451. The next prime is 20464723869509. The reversal of 20464723869471 is 17496832746402.

20464723869471 is a `hidden beast` number, since 2 + 0 + 4 + 6 + 4 + 72 + 38 + 69 + 471 = 666.

It is not a de Polignac number, because 20464723869471 - 2²² = 20464719675167 is a prime.

It is a super-3 number, since 3×20464723869471³ (a number of 41 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a junction number, because it is equal to n+sod(n) for n = 20464723869399 and 20464723869408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20464723869451) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1734145771 + ... + 1734157571.

It is an arithmetic number, because the mean of its divisors is an integer number (704172561456).

Almost surely, 2^{20464723869471} is an apocalyptic number.

20464723869471 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

20464723869471 is a deficient number, since it is larger than the sum of its proper divisors (13335559080417).

20464723869471 is a wasteful number, since it uses less digits than its factorization.

20464723869471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23532 (or 23529 counting only the distinct ones).

The product of its (nonzero) digits is 97542144, while the sum is 63.

The spelling of 20464723869471 in words is "twenty trillion, four hundred sixty-four billion, seven hundred twenty-three million, eight hundred sixty-nine thousand, four hundred seventy-one".