20111534740 has 24 divisors (see below), whose sum is σ = 46073698272. Its totient is φ = 7313285280.

The previous prime is 20111534693. The next prime is 20111534747. The reversal of 20111534740 is 4743511102.

It is a junction number, because it is equal to n+sod(n) for n = 20111534699 and 20111534708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20111534747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45707814 + ... + 45708253.

It is an arithmetic number, because the mean of its divisors is an integer number (1919737428).

Almost surely, 2^20111534740 is an apocalyptic number.

20111534740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20111534740 is an abundant number, since it is smaller than the sum of its proper divisors (25962163532).

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

20111534740 is a wasteful number, since it uses less digits than its factorization.

20111534740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91416087 (or 91416085 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 28.

The spelling of 20111534740 in words is "twenty billion, one hundred eleven million, five hundred thirty-four thousand, seven hundred forty".