20340497424 has 160 divisors (see below), whose sum is σ = 59714928000. Its totient is φ = 5914460160.

The previous prime is 20340497417. The next prime is 20340497461. The reversal of 20340497424 is 42479404302.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5321434 + ... + 5325254.

It is an arithmetic number, because the mean of its divisors is an integer number (373218300).

Almost surely, 2^20340497424 is an apocalyptic number.

20340497424 is a gapful number since it is divisible by the number (24) 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 20340497424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29857464000).

20340497424 is an abundant number, since it is smaller than the sum of its proper divisors (39374430576).

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

20340497424 is a wasteful number, since it uses less digits than its factorization.

20340497424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4313 (or 4307 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 39.

The spelling of 20340497424 in words is "twenty billion, three hundred forty million, four hundred ninety-seven thousand, four hundred twenty-four".