21603145471077 has 8 divisors (see below), whose sum is σ = 29234107304416. Its totient is φ = 14187140309232.

The previous prime is 21603145471031. The next prime is 21603145471079. The reversal of 21603145471077 is 77017454130612.

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

It is not a de Polignac number, because 21603145471077 - 2¹¹ = 21603145469029 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21603145471079) 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, 53739167638 + ... + 53739168039.

It is an arithmetic number, because the mean of its divisors is an integer number (3654263413052).

Almost surely, 2^{21603145471077} is an apocalyptic number.

It is an amenable number.

21603145471077 is a deficient number, since it is larger than the sum of its proper divisors (7630961833339).

21603145471077 is a wasteful number, since it uses less digits than its factorization.

21603145471077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107478335747.

The product of its (nonzero) digits is 987840, while the sum is 48.

The spelling of 21603145471077 in words is "twenty-one trillion, six hundred three billion, one hundred forty-five million, four hundred seventy-one thousand, seventy-seven".