20400035214540 has 24 divisors (see below), whose sum is σ = 57120098600880. Its totient is φ = 5440009390528.

The previous prime is 20400035214529. The next prime is 20400035214551. The reversal of 20400035214540 is 4541253000402.

It is an interprime number because it is at equal distance from previous prime (20400035214529) and next prime (20400035214551).

It is a super-2 number, since 2×20400035214540² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 20400035214498 and 20400035214507.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 170000293395 + ... + 170000293514.

It is an arithmetic number, because the mean of its divisors is an integer number (2380004108370).

Almost surely, 2^{20400035214540} is an apocalyptic number.

20400035214540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20400035214540 is an abundant number, since it is smaller than the sum of its proper divisors (36720063386340).

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

20400035214540 is a wasteful number, since it uses less digits than its factorization.

20400035214540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 340000586921 (or 340000586919 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 30.

Adding to 20400035214540 its reverse (4541253000402), we get a palindrome (24941288214942).

The spelling of 20400035214540 in words is "twenty trillion, four hundred billion, thirty-five million, two hundred fourteen thousand, five hundred forty".