20675420072 has 16 divisors (see below), whose sum is σ = 38790381600. Its totient is φ = 10331318320.

The previous prime is 20675420063. The next prime is 20675420081. The reversal of 20675420072 is 27002457602.

It is an interprime number because it is at equal distance from previous prime (20675420063) and next prime (20675420081).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 785204 + ... + 811107.

It is an arithmetic number, because the mean of its divisors is an integer number (2424398850).

Almost surely, 2^20675420072 is an apocalyptic number.

It is an amenable number.

20675420072 is a deficient number, since it is larger than the sum of its proper divisors (18114961528).

20675420072 is a wasteful number, since it uses less digits than its factorization.

20675420072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1597936 (or 1597932 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 35.

Adding to 20675420072 its reverse (27002457602), we get a palindrome (47677877674).

The spelling of 20675420072 in words is "twenty billion, six hundred seventy-five million, four hundred twenty thousand, seventy-two".