21475028102 has 32 divisors (see below), whose sum is σ = 37851715584. Its totient is φ = 9035769600.

The previous prime is 21475028089. The next prime is 21475028117. The reversal of 21475028102 is 20182057412.

It is a super-2 number, since 2×21475028102² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 668843 + ... + 700214.

It is an arithmetic number, because the mean of its divisors is an integer number (1182866112).

Almost surely, 2^21475028102 is an apocalyptic number.

21475028102 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21475028102 is a deficient number, since it is larger than the sum of its proper divisors (16376687482).

21475028102 is a wasteful number, since it uses less digits than its factorization.

21475028102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1369124.

The product of its (nonzero) digits is 8960, while the sum is 32.

The spelling of 21475028102 in words is "twenty-one billion, four hundred seventy-five million, twenty-eight thousand, one hundred two".