15435477420 has 192 divisors, whose sum is σ = 50669369856. Its totient is φ = 3469086720.

The previous prime is 15435477397. The next prime is 15435477439. The reversal of 15435477420 is 2477453451.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 741474 + ... + 762006.

It is an arithmetic number, because the mean of its divisors is an integer number (263902968).

Almost surely, 2^15435477420 is an apocalyptic number.

15435477420 is a gapful number since it is divisible by the number (10) 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 15435477420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25334684928).

15435477420 is an abundant number, since it is smaller than the sum of its proper divisors (35233892436).

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

15435477420 is a wasteful number, since it uses less digits than its factorization.

15435477420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20640 (or 20638 counting only the distinct ones).

The product of its (nonzero) digits is 470400, while the sum is 42.

The spelling of 15435477420 in words is "fifteen billion, four hundred thirty-five million, four hundred seventy-seven thousand, four hundred twenty".