20293899669 has 6 divisors (see below), whose sum is σ = 29313410646. Its totient is φ = 13529266440.

The previous prime is 20293899667. The next prime is 20293899671. The reversal of 20293899669 is 96699839202.

It is an interprime number because it is at equal distance from previous prime (20293899667) and next prime (20293899671).

It can be written as a sum of positive squares in only one way, i.e., 17523140625 + 2770759044 = 132375^2 + 52638^2 .

It is not a de Polignac number, because 20293899669 - 2¹ = 20293899667 is a prime.

It is a super-2 number, since 2×20293899669² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20293899667) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1127438862 + ... + 1127438879.

It is an arithmetic number, because the mean of its divisors is an integer number (4885568441).

Almost surely, 2^20293899669 is an apocalyptic number.

It is an amenable number.

20293899669 is a deficient number, since it is larger than the sum of its proper divisors (9019510977).

20293899669 is a wasteful number, since it uses less digits than its factorization.

20293899669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2254877747 (or 2254877744 counting only the distinct ones).

The product of its (nonzero) digits is 22674816, while the sum is 63.

The spelling of 20293899669 in words is "twenty billion, two hundred ninety-three million, eight hundred ninety-nine thousand, six hundred sixty-nine".