20234123402440 has 64 divisors (see below), whose sum is σ = 45747207941760. Its totient is φ = 8054546142720.

The previous prime is 20234123402419. The next prime is 20234123402483. The reversal of 20234123402440 is 4420432143202.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6357379 + ... + 8993581.

It is an arithmetic number, because the mean of its divisors is an integer number (714800124090).

Almost surely, 2^{20234123402440} is an apocalyptic number.

20234123402440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20234123402440 is an abundant number, since it is smaller than the sum of its proper divisors (25513084539320).

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

20234123402440 is a wasteful number, since it uses less digits than its factorization.

20234123402440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2637142 (or 2637138 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 31.

Adding to 20234123402440 its reverse (4420432143202), we get a palindrome (24654555545642).

The spelling of 20234123402440 in words is "twenty trillion, two hundred thirty-four billion, one hundred twenty-three million, four hundred two thousand, four hundred forty".