20111152442 has 4 divisors (see below), whose sum is σ = 30166728666. Its totient is φ = 10055576220.

The previous prime is 20111152429. The next prime is 20111152463. The reversal of 20111152442 is 24425111102.

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., 11879038081 + 8232114361 = 108991^2 + 90731^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5027788109 + ... + 5027788112.

Almost surely, 2^20111152442 is an apocalyptic number.

20111152442 is a deficient number, since it is larger than the sum of its proper divisors (10055576224).

20111152442 is a wasteful number, since it uses less digits than its factorization.

20111152442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10055576223.

The product of its (nonzero) digits is 640, while the sum is 23.

Adding to 20111152442 its reverse (24425111102), we get a palindrome (44536263544).

The spelling of 20111152442 in words is "twenty billion, one hundred eleven million, one hundred fifty-two thousand, four hundred forty-two".