21542354151003 has 24 divisors (see below), whose sum is σ = 35562108411648. Its totient is φ = 12309872711472.

The previous prime is 21542354150987. The next prime is 21542354151007. The reversal of 21542354151003 is 30015145324512.

21542354151003 is a `hidden beast` number, since 2 + 1 + 5 + 4 + 2 + 3 + 541 + 5 + 100 + 3 = 666.

It is not a de Polignac number, because 21542354151003 - 2⁴ = 21542354150987 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21542354151007) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27039250 + ... + 27824552.

It is an arithmetic number, because the mean of its divisors is an integer number (1481754517152).

Almost surely, 2^{21542354151003} is an apocalyptic number.

21542354151003 is a deficient number, since it is larger than the sum of its proper divisors (14019754260645).

21542354151003 is a wasteful number, since it uses less digits than its factorization.

21542354151003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1220743 (or 1220740 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 36.

Adding to 21542354151003 its reverse (30015145324512), we get a palindrome (51557499475515).

The spelling of 21542354151003 in words is "twenty-one trillion, five hundred forty-two billion, three hundred fifty-four million, one hundred fifty-one thousand, three".