20134648840 has 32 divisors (see below), whose sum is σ = 47687328000. Its totient is φ = 7629971904.

The previous prime is 20134648837. The next prime is 20134648843. The reversal of 20134648840 is 4884643102.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20134648837) and next prime (20134648843).

It is a super-2 number, since 2×20134648840² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 20134648793 and 20134648802.

It is not an unprimeable number, because it can be changed into a prime (20134648843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13245720 + ... + 13247239.

It is an arithmetic number, because the mean of its divisors is an integer number (1490229000).

Almost surely, 2^20134648840 is an apocalyptic number.

20134648840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20134648840 is an abundant number, since it is smaller than the sum of its proper divisors (27552679160).

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

20134648840 is a wasteful number, since it uses less digits than its factorization.

20134648840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26492989 (or 26492985 counting only the distinct ones).

The product of its (nonzero) digits is 147456, while the sum is 40.

The spelling of 20134648840 in words is "twenty billion, one hundred thirty-four million, six hundred forty-eight thousand, eight hundred forty".