20475537442 has 4 divisors (see below), whose sum is σ = 30713306166. Its totient is φ = 10237768720.

The previous prime is 20475537437. The next prime is 20475537461. The reversal of 20475537442 is 24473557402.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 17347260681 + 3128276761 = 131709^2 + 55931^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5118884359 + ... + 5118884362.

Almost surely, 2^20475537442 is an apocalyptic number.

20475537442 is a deficient number, since it is larger than the sum of its proper divisors (10237768724).

20475537442 is a wasteful number, since it uses less digits than its factorization.

20475537442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10237768723.

The product of its (nonzero) digits is 940800, while the sum is 43.

The spelling of 20475537442 in words is "twenty billion, four hundred seventy-five million, five hundred thirty-seven thousand, four hundred forty-two".