20156550106 has 64 divisors (see below), whose sum is σ = 39963663360. Its totient is φ = 7381820160.

The previous prime is 20156550013. The next prime is 20156550107. The reversal of 20156550106 is 60105565102.

It is a super-2 number, since 2×20156550106² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20156550107) 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, 2244381 + ... + 2253343.

It is an arithmetic number, because the mean of its divisors is an integer number (624432240).

Almost surely, 2^20156550106 is an apocalyptic number.

20156550106 is a deficient number, since it is larger than the sum of its proper divisors (19807113254).

20156550106 is a wasteful number, since it uses less digits than its factorization.

20156550106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9859.

The product of its (nonzero) digits is 9000, while the sum is 31.

The spelling of 20156550106 in words is "twenty billion, one hundred fifty-six million, five hundred fifty thousand, one hundred six".