21254526153 has 24 divisors (see below), whose sum is σ = 35434241856. Its totient is φ = 12025188000.

The previous prime is 21254526151. The next prime is 21254526173. The reversal of 21254526153 is 35162545212.

21254526153 is a `hidden beast` number, since 2 + 1 + 2 + 545 + 2 + 61 + 53 = 666.

It is not a de Polignac number, because 21254526153 - 2¹ = 21254526151 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21254526151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1663803 + ... + 1676528.

It is an arithmetic number, because the mean of its divisors is an integer number (1476426744).

Almost surely, 2^21254526153 is an apocalyptic number.

It is an amenable number.

21254526153 is a deficient number, since it is larger than the sum of its proper divisors (14179715703).

21254526153 is a wasteful number, since it uses less digits than its factorization.

21254526153 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3340445 (or 3340442 counting only the distinct ones).

The product of its digits is 72000, while the sum is 36.

The spelling of 21254526153 in words is "twenty-one billion, two hundred fifty-four million, five hundred twenty-six thousand, one hundred fifty-three".