20124695097840 has 160 divisors (see below), whose sum is σ = 64209891732480. Its totient is φ = 5210360404992.

The previous prime is 20124695097839. The next prime is 20124695097841. The reversal of 20124695097840 is 4879059642102.

It is an interprime number because it is at equal distance from previous prime (20124695097839) and next prime (20124695097841).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20124695097841) 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, 1720521 + ... + 6573399.

It is an arithmetic number, because the mean of its divisors is an integer number (401311823328).

Almost surely, 2^{20124695097840} is an apocalyptic number.

20124695097840 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 20124695097840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32104945866240).

20124695097840 is an abundant number, since it is smaller than the sum of its proper divisors (44085196634640).

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

20124695097840 is a wasteful number, since it uses less digits than its factorization.

20124695097840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4853399 (or 4853393 counting only the distinct ones).

The product of its (nonzero) digits is 8709120, while the sum is 57.

The spelling of 20124695097840 in words is "twenty trillion, one hundred twenty-four billion, six hundred ninety-five million, ninety-seven thousand, eight hundred forty".