21372266036 has 24 divisors (see below), whose sum is σ = 40825451520. Its totient is φ = 9708987200.

The previous prime is 21372265997. The next prime is 21372266051. The reversal of 21372266036 is 63066227312.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 65396 + ... + 216843.

It is an arithmetic number, because the mean of its divisors is an integer number (1701060480).

Almost surely, 2^21372266036 is an apocalyptic number.

It is an amenable number.

21372266036 is a deficient number, since it is larger than the sum of its proper divisors (19453185484).

21372266036 is a wasteful number, since it uses less digits than its factorization.

21372266036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 283975 (or 283973 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 38.

The spelling of 21372266036 in words is "twenty-one billion, three hundred seventy-two million, two hundred sixty-six thousand, thirty-six".