20111133040 has 40 divisors (see below), whose sum is σ = 47898840528. Its totient is φ = 7848245760.

The previous prime is 20111132989. The next prime is 20111133061. The reversal of 20111133040 is 4033111102.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

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, 3062442 + ... + 3069001.

Almost surely, 2^20111133040 is an apocalyptic number.

20111133040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20111133040 is an abundant number, since it is smaller than the sum of its proper divisors (27787707488).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20111133040 is a wasteful number, since it uses less digits than its factorization.

20111133040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6131497 (or 6131491 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 20111133040 its reverse (4033111102), we get a palindrome (24144244142).

The spelling of 20111133040 in words is "twenty billion, one hundred eleven million, one hundred thirty-three thousand, forty".