1920155420 has 24 divisors (see below), whose sum is σ = 4077637200. Its totient is φ = 759431552.

The previous prime is 1920155417. The next prime is 1920155429. The reversal of 1920155420 is 245510291.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1920155429) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 537590 + ... + 541149.

It is an arithmetic number, because the mean of its divisors is an integer number (169901550).

Almost surely, 2^1920155420 is an apocalyptic number.

1920155420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1920155420 is an abundant number, since it is smaller than the sum of its proper divisors (2157481780).

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

1920155420 is a wasteful number, since it uses less digits than its factorization.

1920155420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1078837 (or 1078835 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 29.

The square root of 1920155420 is about 43819.5780445225. The cubic root of 1920155420 is about 1242.9265380097.

The spelling of 1920155420 in words is "one billion, nine hundred twenty million, one hundred fifty-five thousand, four hundred twenty".