21403103113402 has 16 divisors (see below), whose sum is σ = 32415380687592. Its totient is φ = 10598131855360.

The previous prime is 21403103113373. The next prime is 21403103113411. The reversal of 21403103113402 is 20431130130412.

It can be written as a sum of positive squares in 4 ways, for example, as 3361498566721 + 18041604546681 = 1833439^2 + 4247541^2 .

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, 38633749 + ... + 39183832.

Almost surely, 2^{21403103113402} is an apocalyptic number.

21403103113402 is a deficient number, since it is larger than the sum of its proper divisors (11012277574190).

21403103113402 is a wasteful number, since it uses less digits than its factorization.

21403103113402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77818913.

The product of its (nonzero) digits is 1728, while the sum is 25.

Adding to 21403103113402 its reverse (20431130130412), we get a palindrome (41834233243814).

The spelling of 21403103113402 in words is "twenty-one trillion, four hundred three billion, one hundred three million, one hundred thirteen thousand, four hundred two".