21523133034 has 96 divisors (see below), whose sum is σ = 52051603968. Its totient is φ = 6382800000.

The previous prime is 21523132933. The next prime is 21523133041. The reversal of 21523133034 is 43033132512.

21523133034 is a `hidden beast` number, since 2 + 1 + 523 + 133 + 0 + 3 + 4 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 21523132989 and 21523133007.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1814844 + ... + 1826664.

It is an arithmetic number, because the mean of its divisors is an integer number (542204208).

Almost surely, 2^21523133034 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21523133034, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26025801984).

21523133034 is an abundant number, since it is smaller than the sum of its proper divisors (30528470934).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21523133034 is a wasteful number, since it uses less digits than its factorization.

21523133034 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12124 (or 12121 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 27.

Adding to 21523133034 its reverse (43033132512), we get a palindrome (64556265546).

The spelling of 21523133034 in words is "twenty-one billion, five hundred twenty-three million, one hundred thirty-three thousand, thirty-four".