20631251450 has 24 divisors (see below), whose sum is σ = 38382586140. Its totient is φ = 8250681600.

The previous prime is 20631251411. The next prime is 20631251483. The reversal of 20631251450 is 5415213602.

It can be written as a sum of positive squares in 6 ways, for example, as 544708921 + 20086542529 = 23339^2 + 141727^2 .

It is a super-4 number, since 4×20631251450⁴ (a number of 42 digits) contains 4444 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 196370 + ... + 282530.

Almost surely, 2^20631251450 is an apocalyptic number.

20631251450 is a deficient number, since it is larger than the sum of its proper divisors (17751334690).

20631251450 is a wasteful number, since it uses less digits than its factorization.

20631251450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90962 (or 90957 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 29.

The spelling of 20631251450 in words is "twenty billion, six hundred thirty-one million, two hundred fifty-one thousand, four hundred fifty".