21152473050 has 48 divisors (see below), whose sum is σ = 52469632800. Its totient is φ = 5639423040.

The previous prime is 21152473031. The next prime is 21152473061. The reversal of 21152473050 is 5037425112.

It is a super-2 number, since 2×21152473050² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 21152472999 and 21152473017.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 821776 + ... + 847124.

It is an arithmetic number, because the mean of its divisors is an integer number (1093117350).

Almost surely, 2^21152473050 is an apocalyptic number.

21152473050 is an abundant number, since it is smaller than the sum of its proper divisors (31317159750).

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

21152473050 is a wasteful number, since it uses less digits than its factorization.

21152473050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30927 (or 30922 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 30.

Adding to 21152473050 its reverse (5037425112), we get a palindrome (26189898162).

The spelling of 21152473050 in words is "twenty-one billion, one hundred fifty-two million, four hundred seventy-three thousand, fifty".