20126461965 has 64 divisors (see below), whose sum is σ = 33849446400. Its totient is φ = 10201330944.

The previous prime is 20126461961. The next prime is 20126461967. The reversal of 20126461965 is 56916462102.

It is not a de Polignac number, because 20126461965 - 2² = 20126461961 is a prime.

It is a super-2 number, since 2×20126461965² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20126461961) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5424531 + ... + 5428239.

It is an arithmetic number, because the mean of its divisors is an integer number (528897600).

Almost surely, 2^20126461965 is an apocalyptic number.

It is an amenable number.

20126461965 is a deficient number, since it is larger than the sum of its proper divisors (13722984435).

20126461965 is a wasteful number, since it uses less digits than its factorization.

20126461965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3986.

The product of its (nonzero) digits is 155520, while the sum is 42.

The spelling of 20126461965 in words is "twenty billion, one hundred twenty-six million, four hundred sixty-one thousand, nine hundred sixty-five".