20699784001995 has 16 divisors (see below), whose sum is σ = 37851033603840. Its totient is φ = 9462758400864.

The previous prime is 20699784001993. The next prime is 20699784001997. The reversal of 20699784001995 is 59910048799602.

It is an interprime number because it is at equal distance from previous prime (20699784001993) and next prime (20699784001997).

It is not a de Polignac number, because 20699784001995 - 2¹ = 20699784001993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20699784001993) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 98570399905 + ... + 98570400114.

It is an arithmetic number, because the mean of its divisors is an integer number (2365689600240).

Almost surely, 2^{20699784001995} is an apocalyptic number.

20699784001995 is a deficient number, since it is larger than the sum of its proper divisors (17151249601845).

20699784001995 is a wasteful number, since it uses less digits than its factorization.

20699784001995 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197140800034.

The product of its (nonzero) digits is 88179840, while the sum is 69.

The spelling of 20699784001995 in words is "twenty trillion, six hundred ninety-nine billion, seven hundred eighty-four million, one thousand, nine hundred ninety-five".