20992073004 has 144 divisors (see below), whose sum is σ = 61305753600. Its totient is φ = 5932621440.

The previous prime is 20992072987. The next prime is 20992073009. The reversal of 20992073004 is 40037029902.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 20992073004.

It is not an unprimeable number, because it can be changed into a prime (20992073009) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 10174477 + ... + 10176539.

It is an arithmetic number, because the mean of its divisors is an integer number (425734400).

Almost surely, 2^20992073004 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20992073004, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30652876800).

20992073004 is an abundant number, since it is smaller than the sum of its proper divisors (40313680596).

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

20992073004 is a wasteful number, since it uses less digits than its factorization.

20992073004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2500 (or 2495 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 36.

The spelling of 20992073004 in words is "twenty billion, nine hundred ninety-two million, seventy-three thousand, four".