21150202353 has 32 divisors (see below), whose sum is σ = 33014547456. Its totient is φ = 11791821888.

The previous prime is 21150202349. The next prime is 21150202357. The reversal of 21150202353 is 35320205112.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21150202349) and next prime (21150202357).

It is not a de Polignac number, because 21150202353 - 2² = 21150202349 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21150202357) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 842775 + ... + 867507.

It is an arithmetic number, because the mean of its divisors is an integer number (1031704608).

Almost surely, 2^21150202353 is an apocalyptic number.

It is an amenable number.

21150202353 is a deficient number, since it is larger than the sum of its proper divisors (11864345103).

21150202353 is a wasteful number, since it uses less digits than its factorization.

21150202353 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25733.

The product of its (nonzero) digits is 1800, while the sum is 24.

Adding to 21150202353 its reverse (35320205112), we get a palindrome (56470407465).

The spelling of 21150202353 in words is "twenty-one billion, one hundred fifty million, two hundred two thousand, three hundred fifty-three".