21403124402 has 8 divisors (see below), whose sum is σ = 35023294512. Its totient is φ = 9728692900.

The previous prime is 21403124341. The next prime is 21403124437. The reversal of 21403124402 is 20442130412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 486434624 + ... + 486434667.

It is an arithmetic number, because the mean of its divisors is an integer number (4377911814).

Almost surely, 2^21403124402 is an apocalyptic number.

21403124402 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21403124402 is a deficient number, since it is larger than the sum of its proper divisors (13620170110).

21403124402 is a wasteful number, since it uses less digits than its factorization.

21403124402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 972869304.

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 21403124402 its reverse (20442130412), we get a palindrome (41845254814).

The spelling of 21403124402 in words is "twenty-one billion, four hundred three million, one hundred twenty-four thousand, four hundred two".