21174157102 has 16 divisors (see below), whose sum is σ = 36317635200. Its totient is φ = 9069868728.

The previous prime is 21174157057. The next prime is 21174157127. The reversal of 21174157102 is 20175147112.

It is a super-3 number, since 3×21174157102³ (a number of 32 digits) contains 333 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, 369852 + ... + 423247.

It is an arithmetic number, because the mean of its divisors is an integer number (2269852200).

Almost surely, 2^21174157102 is an apocalyptic number.

21174157102 is a deficient number, since it is larger than the sum of its proper divisors (15143478098).

21174157102 is a wasteful number, since it uses less digits than its factorization.

21174157102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 795015.

The product of its (nonzero) digits is 3920, while the sum is 31.

The spelling of 21174157102 in words is "twenty-one billion, one hundred seventy-four million, one hundred fifty-seven thousand, one hundred two".