21032543542 has 8 divisors (see below), whose sum is σ = 31565312856. Its totient is φ = 10510772592.

The previous prime is 21032543527. The next prime is 21032543593. The reversal of 21032543542 is 24534523012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×21032543542² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2744808 + ... + 2752459.

It is an arithmetic number, because the mean of its divisors is an integer number (3945664107).

Almost surely, 2^21032543542 is an apocalyptic number.

21032543542 is a deficient number, since it is larger than the sum of its proper divisors (10532769314).

21032543542 is a wasteful number, since it uses less digits than its factorization.

21032543542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5499182.

The product of its (nonzero) digits is 28800, while the sum is 31.

The spelling of 21032543542 in words is "twenty-one billion, thirty-two million, five hundred forty-three thousand, five hundred forty-two".