21348571950 has 384 divisors, whose sum is σ = 66177907200. Its totient is φ = 5028894720.

The previous prime is 21348571939. The next prime is 21348571961. The reversal of 21348571950 is 5917584312.

21348571950 is a `hidden beast` number, since 2 + 13 + 485 + 71 + 95 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (21348571939) and next prime (21348571961).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a junction number, because it is equal to n+sod(n) for n = 21348571896 and 21348571905.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 75436509 + ... + 75436791.

It is an arithmetic number, because the mean of its divisors is an integer number (172338300).

Almost surely, 2^21348571950 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21348571950, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33088953600).

21348571950 is an abundant number, since it is smaller than the sum of its proper divisors (44829335250).

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

21348571950 is a wasteful number, since it uses less digits than its factorization.

21348571950 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 513 (or 502 counting only the distinct ones).

The product of its (nonzero) digits is 302400, while the sum is 45.

The spelling of 21348571950 in words is "twenty-one billion, three hundred forty-eight million, five hundred seventy-one thousand, nine hundred fifty".