21067552070 has 48 divisors (see below), whose sum is σ = 40397295888. Its totient is φ = 7908736320.

The previous prime is 21067552069. The next prime is 21067552081. The reversal of 21067552070 is 7025576012.

It is a happy number.

It is a super-2 number, since 2×21067552070² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21067552070.

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 23 ways as a sum of consecutive naturals, for example, 359000 + ... + 413540.

It is an arithmetic number, because the mean of its divisors is an integer number (841610331).

Almost surely, 2^21067552070 is an apocalyptic number.

21067552070 is a deficient number, since it is larger than the sum of its proper divisors (19329743818).

21067552070 is a wasteful number, since it uses less digits than its factorization.

21067552070 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54693 (or 54674 counting only the distinct ones).

The product of its (nonzero) digits is 29400, while the sum is 35.

The spelling of 21067552070 in words is "twenty-one billion, sixty-seven million, five hundred fifty-two thousand, seventy".