20541342540 has 48 divisors (see below), whose sum is σ = 59070245472. Its totient is φ = 5329645056.

The previous prime is 20541342533. The next prime is 20541342593. The reversal of 20541342540 is 4524314502.

It is a super-2 number, since 2×20541342540² (a number of 21 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 = 20541342498 and 20541342507.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 4624209 + ... + 4628648.

It is an arithmetic number, because the mean of its divisors is an integer number (1230630114).

Almost surely, 2^20541342540 is an apocalyptic number.

20541342540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20541342540 is an abundant number, since it is smaller than the sum of its proper divisors (38528902932).

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

20541342540 is a wasteful number, since it uses less digits than its factorization.

20541342540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9252906 (or 9252904 counting only the distinct ones).

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

The spelling of 20541342540 in words is "twenty billion, five hundred forty-one million, three hundred forty-two thousand, five hundred forty".