20542143250 has 16 divisors (see below), whose sum is σ = 38454892632. Its totient is φ = 8216857200.

The previous prime is 20542143241. The next prime is 20542143263. The reversal of 20542143250 is 5234124502.

It can be written as a sum of positive squares in 4 ways, for example, as 3109958289 + 17432184961 = 55767^2 + 132031^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41084037 + ... + 41084536.

Almost surely, 2^20542143250 is an apocalyptic number.

20542143250 is a deficient number, since it is larger than the sum of its proper divisors (17912749382).

20542143250 is an equidigital number, since it uses as much as digits as its factorization.

20542143250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82168590 (or 82168580 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 28.

Adding to 20542143250 its reverse (5234124502), we get a palindrome (25776267752).

The spelling of 20542143250 in words is "twenty billion, five hundred forty-two million, one hundred forty-three thousand, two hundred fifty".