20751216285 has 32 divisors (see below), whose sum is σ = 34796931840. Its totient is φ = 10539859968.

The previous prime is 20751216229. The next prime is 20751216293. The reversal of 20751216285 is 58261215702.

It is not a de Polignac number, because 20751216285 - 2¹⁴ = 20751199901 is a prime.

It is a super-2 number, since 2×20751216285² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 52324 + ... + 210333.

It is an arithmetic number, because the mean of its divisors is an integer number (1087404120).

Almost surely, 2^20751216285 is an apocalyptic number.

It is an amenable number.

20751216285 is a deficient number, since it is larger than the sum of its proper divisors (14045715555).

20751216285 is a wasteful number, since it uses less digits than its factorization.

20751216285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262917.

The product of its (nonzero) digits is 67200, while the sum is 39.

The spelling of 20751216285 in words is "twenty billion, seven hundred fifty-one million, two hundred sixteen thousand, two hundred eighty-five".