21146542642024 has 32 divisors (see below), whose sum is σ = 40717099987200. Its totient is φ = 10291135095360.

The previous prime is 21146542641989. The next prime is 21146542642091. The reversal of 21146542642024 is 42024624564112.

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, 155293284 + ... + 155429395.

It is an arithmetic number, because the mean of its divisors is an integer number (1272409374600).

Almost surely, 2^{21146542642024} is an apocalyptic number.

It is an amenable number.

21146542642024 is a deficient number, since it is larger than the sum of its proper divisors (19570557345176).

21146542642024 is a wasteful number, since it uses less digits than its factorization.

21146542642024 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 310722913 (or 310722909 counting only the distinct ones).

The product of its (nonzero) digits is 737280, while the sum is 43.

The spelling of 21146542642024 in words is "twenty-one trillion, one hundred forty-six billion, five hundred forty-two million, six hundred forty-two thousand, twenty-four".