20349694420 has 96 divisors (see below), whose sum is σ = 47208873600. Its totient is φ = 7306775040.

The previous prime is 20349694397. The next prime is 20349694427. The reversal of 20349694420 is 2449694302.

It is a happy number.

It is a super-2 number, since 2×20349694420² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20349694427) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8214222 + ... + 8216698.

It is an arithmetic number, because the mean of its divisors is an integer number (491759100).

Almost surely, 2^20349694420 is an apocalyptic number.

20349694420 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 20349694420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23604436800).

20349694420 is an abundant number, since it is smaller than the sum of its proper divisors (26859179180).

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

20349694420 is a wasteful number, since it uses less digits than its factorization.

20349694420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2953 (or 2951 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 43.

The spelling of 20349694420 in words is "twenty billion, three hundred forty-nine million, six hundred ninety-four thousand, four hundred twenty".