20134554440 has 128 divisors (see below), whose sum is σ = 60826187520. Its totient is φ = 5792947200.

The previous prime is 20134554437. The next prime is 20134554457. The reversal of 20134554440 is 4445543102.

It is a junction number, because it is equal to n+sod(n) for n = 20134554397 and 20134554406.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 211391 + ... + 291470.

It is an arithmetic number, because the mean of its divisors is an integer number (475204590).

Almost surely, 2^20134554440 is an apocalyptic number.

20134554440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20134554440 is an abundant number, since it is smaller than the sum of its proper divisors (40691633080).

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

20134554440 is a wasteful number, since it uses less digits than its factorization.

20134554440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 502903 (or 502899 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 32.

The spelling of 20134554440 in words is "twenty billion, one hundred thirty-four million, five hundred fifty-four thousand, four hundred forty".