21357175710070 has 64 divisors (see below), whose sum is σ = 40274927827200. Its totient is φ = 8143274280960.

The previous prime is 21357175710053. The next prime is 21357175710119. The reversal of 21357175710070 is 7001757175312.

It is a happy number.

It is a super-2 number, since 2×21357175710070² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21357175710070.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 418242340 + ... + 418293400.

It is an arithmetic number, because the mean of its divisors is an integer number (629295747300).

Almost surely, 2^{21357175710070} is an apocalyptic number.

21357175710070 is a deficient number, since it is larger than the sum of its proper divisors (18917752117130).

21357175710070 is a wasteful number, since it uses less digits than its factorization.

21357175710070 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69433.

The product of its (nonzero) digits is 360150, while the sum is 46.

The spelling of 21357175710070 in words is "twenty-one trillion, three hundred fifty-seven billion, one hundred seventy-five million, seven hundred ten thousand, seventy".