20616971433 has 16 divisors (see below), whose sum is σ = 28049478336. Its totient is φ = 13465325120.

The previous prime is 20616971423. The next prime is 20616971461. The reversal of 20616971433 is 33417961602.

It is a cyclic number.

It is not a de Polignac number, because 20616971433 - 2¹² = 20616967337 is a prime.

It is a super-2 number, since 2×20616971433² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20616971423) 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, 11878 + ... + 203408.

It is an arithmetic number, because the mean of its divisors is an integer number (1753092396).

Almost surely, 2^20616971433 is an apocalyptic number.

It is an amenable number.

20616971433 is a deficient number, since it is larger than the sum of its proper divisors (7432506903).

20616971433 is a wasteful number, since it uses less digits than its factorization.

20616971433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192264.

The product of its (nonzero) digits is 163296, while the sum is 42.

The spelling of 20616971433 in words is "twenty billion, six hundred sixteen million, nine hundred seventy-one thousand, four hundred thirty-three".