21542029354 has 16 divisors (see below), whose sum is σ = 32552948736. Its totient is φ = 10691292400.

The previous prime is 21542029351. The next prime is 21542029381. The reversal of 21542029354 is 45392024512.

It is not an unprimeable number, because it can be changed into a prime (21542029351) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 114939 + ... + 237265.

It is an arithmetic number, because the mean of its divisors is an integer number (2034559296).

Almost surely, 2^21542029354 is an apocalyptic number.

21542029354 is a deficient number, since it is larger than the sum of its proper divisors (11010919382).

21542029354 is a wasteful number, since it uses less digits than its factorization.

21542029354 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122981.

The product of its (nonzero) digits is 86400, while the sum is 37.

The spelling of 21542029354 in words is "twenty-one billion, five hundred forty-two million, twenty-nine thousand, three hundred fifty-four".