21431420010 has 384 divisors, whose sum is σ = 78075518976. Its totient is φ = 3931614720.

The previous prime is 21431419993. The next prime is 21431420027. The reversal of 21431420010 is 1002413412.

21431420010 is a `hidden beast` number, since 21 + 431 + 4 + 200 + 10 = 666.

It is an interprime number because it is at equal distance from previous prime (21431419993) and next prime (21431420027).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 2066899 + ... + 2077241.

It is an arithmetic number, because the mean of its divisors is an integer number (203321664).

Almost surely, 2^21431420010 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21431420010, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39037759488).

21431420010 is an abundant number, since it is smaller than the sum of its proper divisors (56644098966).

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

21431420010 is a wasteful number, since it uses less digits than its factorization.

21431420010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10410 (or 10407 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 21431420010 its reverse (1002413412), we get a palindrome (22433833422).

The spelling of 21431420010 in words is "twenty-one billion, four hundred thirty-one million, four hundred twenty thousand, ten".