20133240988 has 24 divisors (see below), whose sum is σ = 40270608000. Its totient is φ = 8627647728.

The previous prime is 20133240851. The next prime is 20133240989. The reversal of 20133240988 is 88904233102.

It is a super-2 number, since 2×20133240988² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20133240988.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20133240989) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 293163 + ... + 355261.

It is an arithmetic number, because the mean of its divisors is an integer number (1677942000).

Almost surely, 2^20133240988 is an apocalyptic number.

20133240988 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

20133240988 is an abundant number, since it is smaller than the sum of its proper divisors (20137367012).

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

20133240988 is a wasteful number, since it uses less digits than its factorization.

20133240988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73689 (or 73687 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 40.

It can be divided in two parts, 20133 and 240988, that added together give a square (261121 = 511²).

The spelling of 20133240988 in words is "twenty billion, one hundred thirty-three million, two hundred forty thousand, nine hundred eighty-eight".