21257403058 has 16 divisors (see below), whose sum is σ = 33766066944. Its totient is φ = 10002207040.

The previous prime is 21257403019. The next prime is 21257403067. The reversal of 21257403058 is 85030475212.

It is a super-3 number, since 3×21257403058³ (a number of 32 digits) contains 333 as substring.

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 7 ways as a sum of consecutive naturals, for example, 263943 + ... + 334933.

It is an arithmetic number, because the mean of its divisors is an integer number (2110379184).

Almost surely, 2^21257403058 is an apocalyptic number.

21257403058 is a deficient number, since it is larger than the sum of its proper divisors (12508663886).

21257403058 is a wasteful number, since it uses less digits than its factorization.

21257403058 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79817.

The product of its (nonzero) digits is 67200, while the sum is 37.

The spelling of 21257403058 in words is "twenty-one billion, two hundred fifty-seven million, four hundred three thousand, fifty-eight".