20122402072 has 8 divisors (see below), whose sum is σ = 37729503900. Its totient is φ = 10061201032.

The previous prime is 20122402063. The next prime is 20122402073. The reversal of 20122402072 is 27020422102.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×20122402072² (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 (20122402073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1257650122 + ... + 1257650137.

Almost surely, 2^20122402072 is an apocalyptic number.

It is an amenable number.

20122402072 is a deficient number, since it is larger than the sum of its proper divisors (17607101828).

20122402072 is a wasteful number, since it uses less digits than its factorization.

20122402072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2515300265 (or 2515300261 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 22.

Adding to 20122402072 its reverse (27020422102), we get a palindrome (47142824174).

The spelling of 20122402072 in words is "twenty billion, one hundred twenty-two million, four hundred two thousand, seventy-two".