21404342010 has 32 divisors (see below), whose sum is σ = 52758813312. Its totient is φ = 5553558720.

The previous prime is 21404341999. The next prime is 21404342021. The reversal of 21404342010 is 1024340412.

It is an interprime number because it is at equal distance from previous prime (21404341999) and next prime (21404342021).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9640486 + ... + 9642705.

It is an arithmetic number, because the mean of its divisors is an integer number (1648712916).

Almost surely, 2^21404342010 is an apocalyptic number.

21404342010 is an abundant number, since it is smaller than the sum of its proper divisors (31354471302).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21404342010 is a wasteful number, since it uses less digits than its factorization.

21404342010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19283238.

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 21404342010 its reverse (1024340412), we get a palindrome (22428682422).

The spelling of 21404342010 in words is "twenty-one billion, four hundred four million, three hundred forty-two thousand, ten".