21261602036046 has 16 divisors (see below), whose sum is σ = 42524054270208. Its totient is φ = 7087058979000.

The previous prime is 21261602036041. The next prime is 21261602036093. The reversal of 21261602036046 is 64063020616212.

It is a super-2 number, since 2×21261602036046² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21261602035995 and 21261602036013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21261602036041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35099590 + ... + 35700201.

It is an arithmetic number, because the mean of its divisors is an integer number (2657753391888).

Almost surely, 2^{21261602036046} is an apocalyptic number.

21261602036046 is an abundant number, since it is smaller than the sum of its proper divisors (21262452234162).

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

21261602036046 is a wasteful number, since it uses less digits than its factorization.

21261602036046 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70849847.

The product of its (nonzero) digits is 124416, while the sum is 39.

The spelling of 21261602036046 in words is "twenty-one trillion, two hundred sixty-one billion, six hundred two million, thirty-six thousand, forty-six".