21534501033 has 12 divisors (see below), whose sum is σ = 31396096368. Its totient is φ = 14222162040.

The previous prime is 21534500959. The next prime is 21534501041. The reversal of 21534501033 is 33010543512.

21534501033 is a `hidden beast` number, since 2 + 153 + 4 + 501 + 0 + 3 + 3 = 666.

It is not a de Polignac number, because 21534501033 - 2¹² = 21534496937 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21534500988 and 21534501006.

It is not an unprimeable number, because it can be changed into a prime (21534501133) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11179983 + ... + 11181908.

It is an arithmetic number, because the mean of its divisors is an integer number (2616341364).

Almost surely, 2^21534501033 is an apocalyptic number.

It is an amenable number.

21534501033 is a deficient number, since it is larger than the sum of its proper divisors (9861595335).

21534501033 is a wasteful number, since it uses less digits than its factorization.

21534501033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22362004 (or 22362001 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 27.

The spelling of 21534501033 in words is "twenty-one billion, five hundred thirty-four million, five hundred one thousand, thirty-three".