20932012997 has 32 divisors (see below), whose sum is σ = 24763791360. Its totient is φ = 17318940480.

The previous prime is 20932012987. The next prime is 20932013009. The reversal of 20932012997 is 79921023902.

It is a cyclic number.

It is not a de Polignac number, because 20932012997 - 2¹⁰ = 20932011973 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20932012987) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 25809722 + ... + 25810532.

It is an arithmetic number, because the mean of its divisors is an integer number (773868480).

Almost surely, 2^20932012997 is an apocalyptic number.

It is an amenable number.

20932012997 is a deficient number, since it is larger than the sum of its proper divisors (3831778363).

20932012997 is a wasteful number, since it uses less digits than its factorization.

20932012997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1521.

The product of its (nonzero) digits is 122472, while the sum is 44.

Adding to 20932012997 its sum of digits (44), we get a square (20932013041 = 144679²).

The spelling of 20932012997 in words is "twenty billion, nine hundred thirty-two million, twelve thousand, nine hundred ninety-seven".