21154506360104 has 128 divisors (see below), whose sum is σ = 43737587712000. Its totient is φ = 9532427514624.

The previous prime is 21154506360089. The next prime is 21154506360107. The reversal of 21154506360104 is 40106360545112.

It is not an unprimeable number, because it can be changed into a prime (21154506360107) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1559255129 + ... + 1559268695.

It is an arithmetic number, because the mean of its divisors is an integer number (341699904000).

Almost surely, 2^{21154506360104} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21154506360104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21868793856000).

21154506360104 is an abundant number, since it is smaller than the sum of its proper divisors (22583081351896).

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

21154506360104 is a wasteful number, since it uses less digits than its factorization.

21154506360104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15367 (or 15363 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 38.

The spelling of 21154506360104 in words is "twenty-one trillion, one hundred fifty-four billion, five hundred six million, three hundred sixty thousand, one hundred four".