21405312150030 has 128 divisors (see below), whose sum is σ = 59858030851200. Its totient is φ = 5435756024832.

The previous prime is 21405312149983. The next prime is 21405312150071. The reversal of 21405312150030 is 3005121350412.

21405312150030 is a `hidden beast` number, since 2 + 1 + 4 + 0 + 5 + 3 + 121 + 500 + 30 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 21405312149976 and 21405312150003.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 18152769 + ... + 19295948.

It is an arithmetic number, because the mean of its divisors is an integer number (467640866025).

Almost surely, 2^{21405312150030} is an apocalyptic number.

21405312150030 is an abundant number, since it is smaller than the sum of its proper divisors (38452718701170).

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

21405312150030 is a wasteful number, since it uses less digits than its factorization.

21405312150030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37448835 (or 37448829 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The spelling of 21405312150030 in words is "twenty-one trillion, four hundred five billion, three hundred twelve million, one hundred fifty thousand, thirty".