16421013510 has 32 divisors (see below), whose sum is σ = 42993199872. Its totient is φ = 3980851680.

The previous prime is 16421013509. The next prime is 16421013559. The reversal of 16421013510 is 1531012461.

It is a happy number.

It is a congruent number.

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, 24879994 + ... + 24880653.

It is an arithmetic number, because the mean of its divisors is an integer number (1343537496).

Almost surely, 2^16421013510 is an apocalyptic number.

16421013510 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16421013510 is an abundant number, since it is smaller than the sum of its proper divisors (26572186362).

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

16421013510 is a wasteful number, since it uses less digits than its factorization.

16421013510 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49760668.

The product of its (nonzero) digits is 720, while the sum is 24.

Adding to 16421013510 its reverse (1531012461), we get a palindrome (17952025971).

The spelling of 16421013510 in words is "sixteen billion, four hundred twenty-one million, thirteen thousand, five hundred ten".