21000836151 has 48 divisors (see below), whose sum is σ = 32972434560. Its totient is φ = 12831436800.

The previous prime is 21000836149. The next prime is 21000836189. The reversal of 21000836151 is 15163800012.

It is not a de Polignac number, because 21000836151 - 2¹ = 21000836149 is a prime.

It is a super-2 number, since 2×21000836151² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21000831151) 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, 870451 + ... + 894251.

It is an arithmetic number, because the mean of its divisors is an integer number (686925720).

Almost surely, 2^21000836151 is an apocalyptic number.

21000836151 is a deficient number, since it is larger than the sum of its proper divisors (11971598409).

21000836151 is a wasteful number, since it uses less digits than its factorization.

21000836151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23976 (or 23973 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The spelling of 21000836151 in words is "twenty-one billion, eight hundred thirty-six thousand, one hundred fifty-one".