20392890672 has 80 divisors (see below), whose sum is σ = 65681010432. Its totient is φ = 5296853760.

The previous prime is 20392890671. The next prime is 20392890737. The reversal of 20392890672 is 27609829302.

It is a super-3 number, since 3×20392890672³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (20392890671) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2755083 + ... + 2762474.

Almost surely, 2^20392890672 is an apocalyptic number.

20392890672 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

20392890672 is an abundant number, since it is smaller than the sum of its proper divisors (45288119760).

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

20392890672 is a wasteful number, since it uses less digits than its factorization.

20392890672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5517586 (or 5517580 counting only the distinct ones).

The product of its (nonzero) digits is 653184, while the sum is 48.

The spelling of 20392890672 in words is "twenty billion, three hundred ninety-two million, eight hundred ninety thousand, six hundred seventy-two".