21067155137 has 8 divisors (see below), whose sum is σ = 24079200000. Its totient is φ = 18055723104.

The previous prime is 21067155101. The next prime is 21067155143. The reversal of 21067155137 is 73155176012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21067155137 - 2⁸ = 21067154881 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21067155137.

It is not an unprimeable number, because it can be changed into a prime (21067155167) 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, 77012 + ... + 219237.

It is an arithmetic number, because the mean of its divisors is an integer number (3009900000).

Almost surely, 2^21067155137 is an apocalyptic number.

It is an amenable number.

21067155137 is a deficient number, since it is larger than the sum of its proper divisors (3012044863).

21067155137 is a wasteful number, since it uses less digits than its factorization.

21067155137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306415.

The product of its (nonzero) digits is 44100, while the sum is 38.

The spelling of 21067155137 in words is "twenty-one billion, sixty-seven million, one hundred fifty-five thousand, one hundred thirty-seven".