1902023011 has 16 divisors (see below), whose sum is σ = 2266103808. Its totient is φ = 1562076000.

The previous prime is 1902023003. The next prime is 1902023017. The reversal of 1902023011 is 1103202091.

It is a cyclic number.

It is not a de Polignac number, because 1902023011 - 2³ = 1902023003 is a prime.

It is a super-2 number, since 2×1902023011² = 7235383068747012242, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1902023011.

It is not an unprimeable number, because it can be changed into a prime (1902023017) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21475 + ... + 65308.

It is an arithmetic number, because the mean of its divisors is an integer number (141631488).

Almost surely, 2^1902023011 is an apocalyptic number.

1902023011 is a deficient number, since it is larger than the sum of its proper divisors (364080797).

1902023011 is a wasteful number, since it uses less digits than its factorization.

1902023011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86922.

The product of its (nonzero) digits is 108, while the sum is 19.

The square root of 1902023011 is about 43612.1887893740. The cubic root of 1902023011 is about 1239.0017570794.

The spelling of 1902023011 in words is "one billion, nine hundred two million, twenty-three thousand, eleven".