21067552068 has 24 divisors (see below), whose sum is σ = 49159971840. Its totient is φ = 7022181600.

The previous prime is 21067552067. The next prime is 21067552069. The reversal of 21067552068 is 86025576012.

It is an interprime number because it is at equal distance from previous prime (21067552067) and next prime (21067552069).

It is not an unprimeable number, because it can be changed into a prime (21067552061) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 452418 + ... + 496806.

It is an arithmetic number, because the mean of its divisors is an integer number (2048332160).

Almost surely, 2^21067552068 is an apocalyptic number.

It is an amenable number.

21067552068 is an abundant number, since it is smaller than the sum of its proper divisors (28092419772).

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

21067552068 is a wasteful number, since it uses less digits than its factorization.

21067552068 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83947 (or 83945 counting only the distinct ones).

The product of its (nonzero) digits is 201600, while the sum is 42.

The spelling of 21067552068 in words is "twenty-one billion, sixty-seven million, five hundred fifty-two thousand, sixty-eight".