20311123434 has 32 divisors (see below), whose sum is σ = 47680169856. Its totient is φ = 5646335040.

The previous prime is 20311123423. The next prime is 20311123447. The reversal of 20311123434 is 43432111302.

It is a happy number.

It is a super-3 number, since 3×20311123434³ (a number of 32 digits) contains 333 as substring.

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, 6533557 + ... + 6536664.

It is an arithmetic number, because the mean of its divisors is an integer number (1490005308).

Almost surely, 2^20311123434 is an apocalyptic number.

20311123434 is an abundant number, since it is smaller than the sum of its proper divisors (27369046422).

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

20311123434 is a wasteful number, since it uses less digits than its factorization.

20311123434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13070270.

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 20311123434 its reverse (43432111302), we get a palindrome (63743234736).

The spelling of 20311123434 in words is "twenty billion, three hundred eleven million, one hundred twenty-three thousand, four hundred thirty-four".