21054024786 has 16 divisors (see below), whose sum is σ = 43938834624. Its totient is φ = 6712877424.

The previous prime is 21054024779. The next prime is 21054024793. The reversal of 21054024786 is 68742045012.

It is an interprime number because it is at equal distance from previous prime (21054024779) and next prime (21054024793).

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76282561 + ... + 76282836.

It is an arithmetic number, because the mean of its divisors is an integer number (2746177164).

Almost surely, 2^21054024786 is an apocalyptic number.

21054024786 is an abundant number, since it is smaller than the sum of its proper divisors (22884809838).

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

21054024786 is a wasteful number, since it uses less digits than its factorization.

21054024786 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152565425.

The product of its (nonzero) digits is 107520, while the sum is 39.

Adding to 21054024786 its reverse (68742045012), we get a palindrome (89796069798).

The spelling of 21054024786 in words is "twenty-one billion, fifty-four million, twenty-four thousand, seven hundred eighty-six".