20112421434 has 32 divisors (see below), whose sum is σ = 46042805760. Its totient is φ = 5737461552.

The previous prime is 20112421379. The next prime is 20112421457. The reversal of 20112421434 is 43412421102.

It is a Curzon 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, 345364 + ... + 399375.

It is an arithmetic number, because the mean of its divisors is an integer number (1438837680).

Almost surely, 2^20112421434 is an apocalyptic number.

20112421434 is an abundant number, since it is smaller than the sum of its proper divisors (25930384326).

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

20112421434 is a wasteful number, since it uses less digits than its factorization.

20112421434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 745394.

The product of its (nonzero) digits is 1536, while the sum is 24.

Adding to 20112421434 its reverse (43412421102), we get a palindrome (63524842536).

The spelling of 20112421434 in words is "twenty billion, one hundred twelve million, four hundred twenty-one thousand, four hundred thirty-four".