20378154420 has 384 divisors, whose sum is σ = 72930816000. Its totient is φ = 4685506560.

The previous prime is 20378154409. The next prime is 20378154421. The reversal of 20378154420 is 2445187302.

It is a happy number.

20378154420 is a `hidden beast` number, since 2 + 0 + 37 + 81 + 544 + 2 + 0 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20378154421) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 6309366 + ... + 6312594.

It is an arithmetic number, because the mean of its divisors is an integer number (189924000).

Almost surely, 2^20378154420 is an apocalyptic number.

20378154420 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 20378154420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36465408000).

20378154420 is an abundant number, since it is smaller than the sum of its proper divisors (52552661580).

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

20378154420 is a wasteful number, since it uses less digits than its factorization.

20378154420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3320 (or 3312 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 36.

The spelling of 20378154420 in words is "twenty billion, three hundred seventy-eight million, one hundred fifty-four thousand, four hundred twenty".