20133151440 has 80 divisors (see below), whose sum is σ = 62428200768. Its totient is φ = 5367513088.

The previous prime is 20133151439. The next prime is 20133151457. The reversal of 20133151440 is 4415133102.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 20133151440.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1314064 + ... + 1329296.

Almost surely, 2^20133151440 is an apocalyptic number.

20133151440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20133151440 is an abundant number, since it is smaller than the sum of its proper divisors (42295049328).

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

20133151440 is a wasteful number, since it uses less digits than its factorization.

20133151440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20756 (or 20750 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

Adding to 20133151440 its reverse (4415133102), we get a palindrome (24548284542).

The spelling of 20133151440 in words is "twenty billion, one hundred thirty-three million, one hundred fifty-one thousand, four hundred forty".