20477429280 has 576 divisors, whose sum is σ = 88923744000. Its totient is φ = 4253921280.

The previous prime is 20477429263. The next prime is 20477429309. The reversal of 20477429280 is 8292477402.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 5431236 + ... + 5435004.

It is an arithmetic number, because the mean of its divisors is an integer number (154381500).

Almost surely, 2^20477429280 is an apocalyptic number.

20477429280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20477429280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44461872000).

20477429280 is an abundant number, since it is smaller than the sum of its proper divisors (68446314720).

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

20477429280 is a wasteful number, since it uses less digits than its factorization.

20477429280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3822 (or 3797 counting only the distinct ones).

The product of its (nonzero) digits is 451584, while the sum is 45.

The spelling of 20477429280 in words is "twenty billion, four hundred seventy-seven million, four hundred twenty-nine thousand, two hundred eighty".