21152350404 has 36 divisors (see below), whose sum is σ = 55193232640. Its totient is φ = 6823338480.

The previous prime is 21152350399. The next prime is 21152350447. The reversal of 21152350404 is 40405325112.

21152350404 is a `hidden beast` number, since 2 + 1 + 152 + 3 + 504 + 0 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×21152350404² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9475744 + ... + 9477975.

Almost surely, 2^21152350404 is an apocalyptic number.

It is an amenable number.

21152350404 is an abundant number, since it is smaller than the sum of its proper divisors (34040882236).

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

21152350404 is a wasteful number, since it uses less digits than its factorization.

21152350404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18953760 (or 18953755 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

Adding to 21152350404 its reverse (40405325112), we get a palindrome (61557675516).

The spelling of 21152350404 in words is "twenty-one billion, one hundred fifty-two million, three hundred fifty thousand, four hundred four".