20290312434 has 64 divisors (see below), whose sum is σ = 48031948800. Its totient is φ = 5590928448.

The previous prime is 20290312403. The next prime is 20290312457. The reversal of 20290312434 is 43421309202.

It is a Curzon number.

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, 1110279 + ... + 1128405.

It is an arithmetic number, because the mean of its divisors is an integer number (750499200).

Almost surely, 2^20290312434 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20290312434, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24015974400).

20290312434 is an abundant number, since it is smaller than the sum of its proper divisors (27741636366).

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

20290312434 is a wasteful number, since it uses less digits than its factorization.

20290312434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19087.

The product of its (nonzero) digits is 10368, while the sum is 30.

The spelling of 20290312434 in words is "twenty billion, two hundred ninety million, three hundred twelve thousand, four hundred thirty-four".