20434443402 has 32 divisors (see below), whose sum is σ = 42408368640. Its totient is φ = 6559363440.

The previous prime is 20434443397. The next prime is 20434443409.

20434443402 is nontrivially palindromic in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 20434443402.

It is not an unprimeable number, because it can be changed into a prime (20434443409) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 539452 + ... + 576087.

It is an arithmetic number, because the mean of its divisors is an integer number (1325261520).

Almost surely, 2^20434443402 is an apocalyptic number.

20434443402 is an abundant number, since it is smaller than the sum of its proper divisors (21973925238).

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

20434443402 is a wasteful number, since it uses less digits than its factorization.

20434443402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1115658.

The product of its (nonzero) digits is 36864, while the sum is 30.

The spelling of 20434443402 in words is "twenty billion, four hundred thirty-four million, four hundred forty-three thousand, four hundred two".