20434673400 has 96 divisors (see below), whose sum is σ = 63810134640. Its totient is φ = 5409448960.

The previous prime is 20434673393. The next prime is 20434673411. The reversal of 20434673400 is 437643402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 42099 + ... + 206498.

Almost surely, 2^20434673400 is an apocalyptic number.

20434673400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20434673400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31905067320).

20434673400 is an abundant number, since it is smaller than the sum of its proper divisors (43375461240).

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

20434673400 is a wasteful number, since it uses less digits than its factorization.

20434673400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248753 (or 248744 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 33.

The spelling of 20434673400 in words is "twenty billion, four hundred thirty-four million, six hundred seventy-three thousand, four hundred".