21082698450 has 72 divisors (see below), whose sum is σ = 61791487056. Its totient is φ = 5110956000.

The previous prime is 21082698431. The next prime is 21082698451. The reversal of 21082698450 is 5489628012.

21082698450 is a `hidden beast` number, since 2 + 108 + 2 + 6 + 98 + 450 = 666.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

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 = 21082698396 and 21082698405.

It is not an unprimeable number, because it can be changed into a prime (21082698451) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 2124616 + ... + 2134515.

It is an arithmetic number, because the mean of its divisors is an integer number (858215098).

Almost surely, 2^21082698450 is an apocalyptic number.

21082698450 is an abundant number, since it is smaller than the sum of its proper divisors (40708788606).

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

21082698450 is a wasteful number, since it uses less digits than its factorization.

21082698450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4259160 (or 4259152 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 45.

The spelling of 21082698450 in words is "twenty-one billion, eighty-two million, six hundred ninety-eight thousand, four hundred fifty".