1920156049 has 8 divisors (see below), whose sum is σ = 2197392128. Its totient is φ = 1643652000.

The previous prime is 1920156047. The next prime is 1920156061. The reversal of 1920156049 is 9406510291.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1920156049 - 2¹ = 1920156047 is a prime.

It is a super-2 number, since 2×1920156049² = 7373998505022580802, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1920155999 and 1920156017.

It is not an unprimeable number, because it can be changed into a prime (1920156041) 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, 177372 + ... + 187885.

It is an arithmetic number, because the mean of its divisors is an integer number (274674016).

Almost surely, 2^1920156049 is an apocalyptic number.

It is an amenable number.

1920156049 is a deficient number, since it is larger than the sum of its proper divisors (277236079).

1920156049 is an equidigital number, since it uses as much as digits as its factorization.

1920156049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 366015.

The product of its (nonzero) digits is 19440, while the sum is 37.

The square root of 1920156049 is about 43819.5852216791. The cubic root of 1920156049 is about 1242.9266737280.

The spelling of 1920156049 in words is "one billion, nine hundred twenty million, one hundred fifty-six thousand, forty-nine".