20111023042 has 12 divisors (see below), whose sum is σ = 33158257398. Its totient is φ = 9141374000.

The previous prime is 20111023027. The next prime is 20111023129. The reversal of 20111023042 is 24032011102.

It can be written as a sum of positive squares in only one way, i.e., 18752289721 + 1358733321 = 136939^2 + 36861^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 41551459 + ... + 41551942.

Almost surely, 2^20111023042 is an apocalyptic number.

20111023042 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20111023042 is a deficient number, since it is larger than the sum of its proper divisors (13047234356).

20111023042 is a wasteful number, since it uses less digits than its factorization.

20111023042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83103425 (or 83103414 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 20111023042 its reverse (24032011102), we get a palindrome (44143034144).

The spelling of 20111023042 in words is "twenty billion, one hundred eleven million, twenty-three thousand, forty-two".