21472578094 has 16 divisors (see below), whose sum is σ = 35581720320. Its totient is φ = 9636714360.

The previous prime is 21472578031. The next prime is 21472578109. The reversal of 21472578094 is 49087527412.

It is a super-2 number, since 2×21472578094² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

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, 6175644 + ... + 6179119.

It is an arithmetic number, because the mean of its divisors is an integer number (2223857520).

Almost surely, 2^21472578094 is an apocalyptic number.

21472578094 is a deficient number, since it is larger than the sum of its proper divisors (14109142226).

21472578094 is a wasteful number, since it uses less digits than its factorization.

21472578094 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12354855.

The product of its (nonzero) digits is 1128960, while the sum is 49.

The spelling of 21472578094 in words is "twenty-one billion, four hundred seventy-two million, five hundred seventy-eight thousand, ninety-four".