23401742420 has 72 divisors (see below), whose sum is σ = 57733368840. Its totient is φ = 7943980800.

The previous prime is 23401742417. The next prime is 23401742431. The reversal of 23401742420 is 2424710432.

It can be written as a sum of positive squares in 4 ways, for example, as 5813147536 + 17588594884 = 76244^2 + 132622^2 .

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, 19235 + ... + 217194.

It is an arithmetic number, because the mean of its divisors is an integer number (801852345).

Almost surely, 2^23401742420 is an apocalyptic number.

23401742420 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 23401742420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28866684420).

23401742420 is an abundant number, since it is smaller than the sum of its proper divisors (34331626420).

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

23401742420 is a wasteful number, since it uses less digits than its factorization.

23401742420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 236553 (or 236544 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 29.

The spelling of 23401742420 in words is "twenty-three billion, four hundred one million, seven hundred forty-two thousand, four hundred twenty".