20120201992 has 16 divisors (see below), whose sum is σ = 41154958800. Its totient is φ = 9145546320.

The previous prime is 20120201989. The next prime is 20120201999. The reversal of 20120201992 is 29910202102.

It is a super-3 number, since 3×20120201992³ (a number of 32 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20120201992.

It is not an unprimeable number, because it can be changed into a prime (20120201999) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 114319242 + ... + 114319417.

It is an arithmetic number, because the mean of its divisors is an integer number (2572184925).

Almost surely, 2^20120201992 is an apocalyptic number.

20120201992 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

20120201992 is an abundant number, since it is smaller than the sum of its proper divisors (21034756808).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20120201992 is a wasteful number, since it uses less digits than its factorization.

20120201992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228638676 (or 228638672 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 28.

The spelling of 20120201992 in words is "twenty billion, one hundred twenty million, two hundred one thousand, nine hundred ninety-two".